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8x + 5y = 93x + 2y = 4 |
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Answer» 8x +5y =9 …(1)3x +2y =4 …(2)8x +5y =9Subtract 8x both sides we get5y = 9 – 8xDivide by 5Y = (9 – 8 x)/5 …(3)Plug this value of y in equation second we get3x +2y =43x + 2(9 – 8 x)/5) = 4Multiply by 5 we get15 x + 18 - 16 x = 20-x = 2x = - 2Plug this value back in equation (3) we gety = (9- 8(-2))/5y = 25/5y = 5 X=-2; y=5 By substitution method X = -2 |
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