What is the answer to |7x|=12 ?

The answer to |7x|=12 is x=-12/7 \lor x= 12/7

The solution is x=-12/7 \lor x= 12/7

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|7x|=12

∣ 7 x ∣ = 12

x = - \frac{12}{7} or x = \frac{12}{7}

Decimal

x = - 1.71428 \dots, x = 1.71428 \dots

Solution steps

∣ 7 x ∣ = 12

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

7 x = - 12 or 7 x = 12

7 x = - 12 or 7 x = 12

x = - \frac{12}{7} or x = \frac{12}{7}

∣ 5 - 4 x ∣ = 0

∣ x + 1 ∣ = ∣ x + 3 ∣

∣ h + 4 ∣ = 11

f (x) = ∣ x ∣

29 - 8 ∣ x ∣ = - 43