Identify like terms in the expression. Add or subtract the coefficients of like terms. Rewrite the expression with combined terms. Simplify 4x+5−2x+3. Combine the like terms (4x and −2x): 4x−2x=2x. Combine constants (5 and 3; 5 + 3 = 8).

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Learn how to use the Algebra Calculator to check your answers to algebra problems. Solve 2x+3=15. First go to the Algebra Calculator main page. Type the following: First type the equation 2x+3=15. Then type the @ symbol. Then type x=6. Try entering 2x+3=15 @ x=6 into the text box.