What value of a will make this equation true?
15 - a = 20

x> 6

step-by-step explanation:

8x+8> 7x+14

8x-7x> 14-8

x> 6

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

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step-by-step explanation: