gi guys please give me the answer sum number 10,12,14
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10.
x + 2y = 3/2 ------------------- (1)
2x + y = 3/2 --------------------- (2)
Solving (1) * 2, (2) we get
2x + 4y = 6/2
2x + y= 3/2
--------------------
4y - y = 6/2 - 3/2
3y = 3/2
y = 1/2.
Substitute y = 1/2 in (1), we get
x + 2y = 3/2
x + 2(1/2) = 3/2
x + 1 = 3/2
x = 3/2 - 1
x = 1/2.
Therefore x = 1/2, y = 1/2.
12.
33x - y - 7 + 22 = 110
33x - y + 15 = 110
33 - y = 95
14y + x + 11 = 70
14y + x = 70 - 11
14y + x = 59 ---------- (2)
Now,
On solving (1) * 14 & (2), we get
462x - 14y = 1330
x + 14y = 59
-------------------------
463x = 1389
x = 3.
Substitute x = 3 in (2), we get
14y + x = 59
14y + 3 = 59
14y = 56
y = 4.
Therefore the value of x = 3, y = 4.
14.
0.5x + 0.7y = 0.74 ---------- (1)
0.3x + 0.5y = 0.5 ------------ (2)
on solving (1) * 3 & (2) * 5, we get
1.5x + 2.1y = 2.22
1.5x + 2.5y = 2.5
------------------------------
-0.4y = -0.28
y = 0.7
Substitute y = 0.7 in (2), we get
0.3x + 0.5y = 0.5
0.3x + 0.5(0.7) = 0.5
0.3x + 0.35 = 0.5
0.3x = 0.15
x = 0.5.
Therefore x = 0.5, y = 0.7
Hope this helps!
x + 2y = 3/2 ------------------- (1)
2x + y = 3/2 --------------------- (2)
Solving (1) * 2, (2) we get
2x + 4y = 6/2
2x + y= 3/2
--------------------
4y - y = 6/2 - 3/2
3y = 3/2
y = 1/2.
Substitute y = 1/2 in (1), we get
x + 2y = 3/2
x + 2(1/2) = 3/2
x + 1 = 3/2
x = 3/2 - 1
x = 1/2.
Therefore x = 1/2, y = 1/2.
12.
33x - y - 7 + 22 = 110
33x - y + 15 = 110
33 - y = 95
14y + x + 11 = 70
14y + x = 70 - 11
14y + x = 59 ---------- (2)
Now,
On solving (1) * 14 & (2), we get
462x - 14y = 1330
x + 14y = 59
-------------------------
463x = 1389
x = 3.
Substitute x = 3 in (2), we get
14y + x = 59
14y + 3 = 59
14y = 56
y = 4.
Therefore the value of x = 3, y = 4.
14.
0.5x + 0.7y = 0.74 ---------- (1)
0.3x + 0.5y = 0.5 ------------ (2)
on solving (1) * 3 & (2) * 5, we get
1.5x + 2.1y = 2.22
1.5x + 2.5y = 2.5
------------------------------
-0.4y = -0.28
y = 0.7
Substitute y = 0.7 in (2), we get
0.3x + 0.5y = 0.5
0.3x + 0.5(0.7) = 0.5
0.3x + 0.35 = 0.5
0.3x = 0.15
x = 0.5.
Therefore x = 0.5, y = 0.7
Hope this helps!
siddhartharao77:
Gud luck!
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