2 years ago

I need to solve for 3x+7=-x-1

Mathematics

1 answer:

Andrew [12]2 years ago

3 0

3x+7=-x-1

move -x to the other side

sign changes from -x to +x

3x+x+7=-x+x-1

3x+x+7=-1

4x+7=-1

move 7 to the other side

sign changes from +7 to -7

4x+7-7=-1-7

4x=-8

Divide by 4 for both sides

4x/4=-8/4

Answer: x=-2

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Read 2 more answers

Solve the system of linear equations by substitution.<br> 2x-y=3<br> x+5y=14

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Let 2x – y = 3 ——— equation 1

Let x + 5y = 14 ——— equation 2

Making x the subject in eqn 1, = x = y + 3 / 2 ——— eqn 3

• Put eqn 3 in eqn 2

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