3 years ago

Absolute Value Equation | -4 + 5x |= 16 Please show how to do the problem.

1 answer:

4 0

If you have |a|=b, solve a=b and a=-b

so
|-4+5x|=16
so solve
-4+5x=16 and -4+5x=-16
add 4 to both sides
5x=20 and 5x=-12
divide both sides by 5
x=4 and x=-12/5

the 2 solutions are x=-12/5 and x=4

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