Examples 2
Solve
- 3(x + 2) = 21
First expand brackets
3x + 6 = 21
Take 6 from both sides
3x = 15
Divide both sides by 3
x = 5
- 2(c - 3) = 30
Expand brackets
2c - 6 = 30
Add 6 to both sides
2c = 36
Divide both sides by 2
c = 18
- 4 - 2(n - 4) = -3
Expand brackets
4 - 2n + 8 = -3
Collect 'like' terms
12 - 2n = -3
Take 12 from both sides
-2n = -15
Divide both sides by -2n = 7.5
n
=
-15
-2
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