0.5x + 0.7y = 0.74 0.3x + 0.5y =0.5
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Answered by
191
0.5 x +0.7 y = 0.74 (i)
multiply 10 on both sides in (i)
=> 5x+7y=7.4
0.3 x + 0.5 y =0.5 (ii)
multiply 10 on both sides in (ii)
3 x + 5 y = 5
y=1-0.6x (from ii equation)
Now, Substitute value in equation i
5x+7y = 5x + 7(1-0.6x)=7.4
=>5x +7-4.2x =7.4
=>0.8x+ 7 = 7.4
=>x=0.5
Now substitute x value in any equation.
Let us take the second equation.
0.3x + 0.5y =0.5
(0.3×0.5)+0.5y= 0.5
0.3+y= 1
∴y=0.7
Hope my answer is helpful to u. Pls mark it the brainliest if u like.
multiply 10 on both sides in (i)
=> 5x+7y=7.4
0.3 x + 0.5 y =0.5 (ii)
multiply 10 on both sides in (ii)
3 x + 5 y = 5
y=1-0.6x (from ii equation)
Now, Substitute value in equation i
5x+7y = 5x + 7(1-0.6x)=7.4
=>5x +7-4.2x =7.4
=>0.8x+ 7 = 7.4
=>x=0.5
Now substitute x value in any equation.
Let us take the second equation.
0.3x + 0.5y =0.5
(0.3×0.5)+0.5y= 0.5
0.3+y= 1
∴y=0.7
Hope my answer is helpful to u. Pls mark it the brainliest if u like.
Answered by
70
Answer:x=0.5 and y=0.7
Explanation:0.5x+0.7y=0.74___(i)
0.3x+0.5y=0.5____(i)
Multiplying 3 in i. and 5 in ii. and subtracting
1.5x+2.1y=2.22
1.5x+2.5y=2.5
_____________
-0.4y= -0.28
y=(-0.28)/(0.4)=0.7
So, 0.3x+0.5*0.7=0.5
x=0.15/0.3=0.5
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