What is the answer to 20=|1-3c| ?

The answer to 20=|1-3c| is c=-19/3 \lor c=7

Solve for c: 20=|1-3c|

The solution is c=-19/3 \lor c=7

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20 = ∣ 1 - 3 c ∣

c = - \frac{19}{3} or c = 7

Decimal Notation

c = - 6.33333 \dots, c = 7

Solution steps

20 = ∣ 1 - 3 c ∣

Switch sides

∣ 1 - 3 c ∣ = 20

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

1 - 3 c = - 20 or 1 - 3 c = 20

1 - 3 c = - 20 or 1 - 3 c = 20

c = - \frac{19}{3} or c = 7

15 = ∣ b - 11 ∣

- ∣ 3 x - 7 ∣ + 7 = 4

\frac{b}{12} = 10

10 = \frac{y}{5}

∣ 9 + 3 c ∣ = 15