7x minus 8y =6 nd 5x + 2y =12
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7x-8y = 6 ........1
5x+2y=12 ..........2
form eq 1
7x= 6+8y
x= 6+8y/7 ........3
put x in eq2
5x+2y=12
5(6+8y/7) +2y =12
30+49y/7. + 2y =12
30/7 + 49y/7 +2y = 12
7y+2y = 12 - 30/7
9y = 84-30/7 = 54/7
y= 54/7 × 1/9 = 6/7
put y in x
x= 6+8y/7 = 6. + 48/7 / 7 = 42+ 48 / 7 / 7
x= 90/7 /7 = 90/7 × 1/7 = 90/49
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