x-3y=35,2x+4y=28 solve by multiplication method
Answers
Answered by
0
Answer:x=22.4
y= -4.2
Step-by-step explanation:
x-3y=35 ...eq1
2x+4y=28 ...eq2
multiply eq1 by 2
2x-6y=70 ...eq3
then sub eq3 for eq2
(2x-6y)-(2x+4y)=70-28
-10y=42
y= -4.2
put y=-4.2
x-3× -4.2=35
x+12.6=35
x=35-12.6
x=22.4
Answered by
1
Answer:
x = 22.4, y= - 4.2
Step-by-step explanation:
2 x + 4 y = 28___(1)
x - 3 y = 35
=> x = 3 y + 35 ____(2)
sub. eq (2) in eq (1), we get,
2 ( 3 y + 35 ) + 4 y = 28
=> 6 y + 70 + 4 y = 28
=> 10 y = - 42
=> y = 21 / 5 = - 4.2
sub. this in eq (2), we get
x = - 12.6 + 35
=> x = 22.4
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