Equations with brackets
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. Solve for x: 3(x + 5) = 33
2. Solve for x: 4(x + 4) = 64
3. Solve for x: 3(x + 7) = 24
4. Solve for x: 5(x + 7) = 90
5. Solve for x: 3(x + 8) = 57
Answer key ยท Equations with brackets
1. 6
3 lots of (x + 5) make 33.
Divide both sides by 3: x + 5 = 11.
Take 5 from both sides: x = 6.
2. 12
4 lots of (x + 4) make 64.
Divide both sides by 4: x + 4 = 16.
Take 4 from both sides: x = 12.
3. 1
3 lots of (x + 7) make 24.
Divide both sides by 3: x + 7 = 8.
Take 7 from both sides: x = 1.
4. 11
5 lots of (x + 7) make 90.
Divide both sides by 5: x + 7 = 18.
Take 7 from both sides: x = 11.
5. 11
3 lots of (x + 8) make 57.
Divide both sides by 3: x + 8 = 19.
Take 8 from both sides: x = 11.
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