What is the answer to |b|+4=8 ?

The answer to |b|+4=8 is b=-4\lor b=4

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|b|+4=8

∣ b ∣ + 4 = 8

b = - 4 or b = 4

Solution steps

∣ b ∣ + 4 = 8

Move

4

to the right side

∣ b ∣ = 4

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

b = - 4 or b = 4

∣ x ∣ = x^{3}

∣ 100 - x ∣ = 50

∣ 2 x + 5 ∣ - 4 = 6

\frac{x + 2}{2} = 7

9 - 2 ∣ x - 3 ∣ = 2