Question

x+2y=12, 2x +7y=18 give me answer

Answer 1

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x+2y=12-------------(1)
2x+7y=18--------------(2)
Solving eq 1
x+2y=12
x=12-2y------------(3)
Substituting the value of x in eq 2
2x+7y=18
2(12-2y)+7y=18
24-4y+7y=18
3y=18-24
3y=-6
y=-6/3
y=-2
Putting the value of y in eq 3
x=12-2y
x=12-2*-2
x=12+4
x=16