Solving systems using substitution -x+1=y & 3x -y=-8 i need the answer

When using soving systems using substitution
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From the second equation, y=3x+8. Therefore, substituting this in the first equation: -x+1=3x+8, -7=4x and x=-7/4 or -1.75. Substituting this in either equation: y=-21/4+8=11/4.

Check result: -x+1=7/4+1=11/4=y; 3x-y=-21/4-11/4=-32/4=-8.

by Top Rated User (1.2m points)

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