Question

12. 3x - y+7/11 +2 = 10
2y + x+11/7=10
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Answer 1

Answer:

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Step-by-step explanation:

3x- (y-7)/11 +2 =10  

multiply both sides by 11  

33x -(y-7) + 22 = 110  

33x-y+7+22=110  

33x-y +29 = 110  

33x-y = 81 --------------(1)  

2y+(x+11)/7 = 10  

multiply both sides by 7  

14y +(x+11) = 70  

14y +x + 11 = 70  

x+14y = 59 ------------(2)  

33x-y = 81 --------------(1)  

x+14y = 59 ------------(2)  

Multiply equation (1) by 14  

462x-14y = 1134  

x+14y = 59 --------(2)  

add:26124/6482  

463 x = 1193  

x= 1193/463  

substitute x=1193/463 into equation (2)  

1193/463 + 14y = 59  

multiply both sides by 463  

1193 + 6482y = 27317  

6482y = 26124  

y = 26124 / 6482  

divide the numerator and the denominator by 14  

y = 1866/ 463  

x= 1193/463  

y = 1866/ 463

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