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Mathematical substitution method. process
4(x+2)+5y= 1……①

2x+3(y+2)=3……②

Simplify (1)

4x+8+5y= 1

4x+5y=-7

Simplified type ②

2x+3y+6=3

2x+3y=-3

It can be obtained from ②.

2x=-3y-3

Multiply both sides by 2 at the same time

4x=-6y-6……③

You can get it by bringing ③ into ①.

-6y-6+5y=-7

y= 1

Bring y= 1 into ① formula.

x=-3

therefore

x=-3

y= 1

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