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klemol [59]
3 years ago
7

Solve it by substitution

Mathematics
1 answer:
Debora [2.8K]3 years ago
4 0
4x-3y=-1
3x-y=-2      ⇒y=3x+2


substitution method:

4x-3(3x+2)=-1
4x-9x-6=-1
-5x=-1+6
-5x=5
x=5/-5=-1

y=3x+2
y=3(-1)+2=-3+2=-1

answer: x=-1; y=-1

to check:
4x-3y=-1
4(-1)-3(-1)=-4+3=-1

3x-y=-2
3(-1)-(-1)=-3+1=-2
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