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16+24=-4(9x-10)
Use the Distributive property first:
16+24=-36x+40
Make sure that x's and other variables are on the left side of the equation. Remember to use the opposite operation!
36x-40=-16-24
Now, make sure all the numbers are on the right side of the equation:
36x=40-16-24
36x=0
x=0
All the best!