Worked example
3(x − 2) + 4 = 19
- Distribute 3: 3x − 6 + 4 = 19.
- Combine constants: 3x − 2 = 19.
- Add 2 and divide by 3: x = 7.
- Check: 3(7 − 2) + 4 = 19.
Math guide
Distribute first — without losing a term.
Use distribution carefully, combine like terms, isolate the variable, and check the result in the original equation.
Multiply the factor outside parentheses by every term inside. Then combine like terms, solve the resulting equation and substitute the answer into the unexpanded original.
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