What is the answer to |3+5x|=7 ?

The answer to |3+5x|=7 is x=-2\lor x= 4/5

Solve for x: |3+5x|=7

The solution is x=-2\lor x= 4/5

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∣ 3 + 5 x ∣ = 7

x = - 2 or x = \frac{4}{5}

Decimal Notation

x = - 2, x = 0.8

Solution steps

∣ 3 + 5 x ∣ = 7

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

3 + 5 x = - 7 or 3 + 5 x = 7

3 + 5 x = - 7 or 3 + 5 x = 7

x = - 2 or x = \frac{4}{5}

- 2 ∣ x - 5 ∣ - 11 = - 29

∣ 2 y + 8 ∣ + 7 = 1

5 + 9 ∣ x + 5 ∣ = 104

∣ 3 x + 0.1 ∣ = 6

∣ 2 b + 3 ∣ - 7 = 8