following pairs of equations 5x+7y=66 and 2x-3y=-20
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Step-by-step explanation:
5x + 7y=66.........(1)
2x + 3y= -20..........(2)
(1)X 2 = 10x + 14y=132
(2)X 5 = 10x + 15y= -100
_______________
0 + y = 32
y = 32
substituting y=32, in equation (2).....
2x + 3y = -20
2x + 3 X 32 = -20
2x + 96 = -20
2x = -20-96
2x= -116
X = -58
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