Question

can someone show me how to solve this step by step I have sixteen to do and i am confused thank you ã2x -7+8=11

Answer 1

I'm not sure if this is the same with the other post, but I'll just paste it here.

If you mean
√(2x - 7) + 8 = 11
Then, first we isolate the whole squareroot term on one side of equation:
√(2x - 7) = 11 - 8
√(2x - 7) = 3
Then we square both sides:
2x - 7 = 9
2x = 9 + 7
2x = 16
x = 8
Note that if we're dealing with squareroots, we always check whether the answer can satisfy the original equation, or it is extraneous. Substituting x = 8,
√(2x - 7) + 8 = 11
√(2*8 - 7) + 8 = 11
√(16 - 7) + 8 = 11
√(9) + 8 = 11
3 + 8 = 11
11 = 11
Thus x is equal to 8.

Hope this helps~ :3