exam Maths Puzzle Numerical Ability

9x+7=5x-3

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Need help, got a test on Tuesday could you please show me how to work this problem.

y=mx+b;find m when x=-2, y=1, and b=5

I really appreciate any help you could give me how can i solve this equation for x and check my result ..please help

7(3x + 4) =8(2x +5) + 13