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Using your new skill, combine the left side: 7x = 49 Now divide both sides by 7: x = 7
You have two savings accounts. Account A earns 3 units of interest per month (3x). Account B earns 4 units of interest per month (4x). Your total monthly interest is 7x. If "x" equals $10, you make $70 per month. 3x plus 4x
: In plus-size clothing, 3X and 4X refer to specific garment sizes. A 4X typically offers more room in the chest and waist and is slightly longer than a 3X . Using your new skill, combine the left side:
3x+4x=(3+4)x=7x3 x plus 4 x equals open paren 3 plus 4 close paren x equals 7 x Key Concepts : The number multiplying the variable (e.g., in , the coefficient is Variable : The letter representing an unknown value ( Expression vs. Equation : is an expression because it has no equal sign. If it were , it would be an equation with a solution ( Other Contexts for "3x" and "4x" Your total monthly interest is 7x
In arithmetic, you work with concrete numbers: 3 + 4 = 7. In algebra, you work with abstract patterns: 3(something) + 4(something) = 7(something).
The simplified result of is . In algebra, this process is known as combining like terms . Since both terms share the exact same variable ( ) raised to the same power ( ), you simply add their numerical coefficients ( ) and keep the variable the same. 1. Identify Like Terms