solve 3x+7=22 — step-by-step solution

Let's solve in

ℝ

3 x + 7 = 22

ⓘ Subtract

7

from both sides

3 x = 22 - 7

ⓘ Start from

22

and move back

7

on the number line:

22 - 7

15

3 x = 15

ⓘ Both sides are divided by

3

x = \frac{15}{3}

ⓘ Simplify the fraction by dividing the numerator and the denominator by

3

, their greatest common divisor:

\frac{15}{3}

5

▶Solution obtained:

x = 5