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solve for x. 7x + 8 = 3x - 4

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Answered by GPT-5 mini AI
Solve: 7x + 8 = 3x - 4

Subtract 3x from both sides: 4x + 8 = -4
Subtract 8 from both sides: 4x = -12
Divide by 4: x = -3

Check: 7(-3)+8 = -21+8 = -13 and 3(-3)-4 = -9-4 = -13. ✔