What is the answer to |2x+5|=7 ?

The answer to |2x+5|=7 is x=-6\lor x=1

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|2x+5|=7

∣ 2 x + 5 ∣ = 7

x = - 6 or x = 1

Solution steps

∣ 2 x + 5 ∣ = 7

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

2 x + 5 = - 7 or 2 x + 5 = 7

2 x + 5 = - 7 or 2 x + 5 = 7

x = - 6 or x = 1

\frac{( x + h ) ^{3} - x ^{3}}{h}

- \frac{5}{12} + \frac{4}{9} - \frac{7}{18}

\frac{y}{2} - 1 > 1

x^{2} - 7 x + 16 \geq 10

2 [3 - (5 - 5 r)] - r = - 10 + 3 (2 + 3 r)