SAT/ACT MATH UNIT 10 Equation with More Than One Variable.

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Presentation transcript:

SAT/ACT MATH UNIT 10 Equation with More Than One Variable

Typical SAT questions Find the value of an expression that is a multiple of one side of an equation. Solve for one letter in terms of the other letter(s) of an equation.

Working With An Equation in Two Unknowns Ex. 1) If 3x + 3y = 12, what is the value of 2x + 2y?8

Solving For One Letter In Terms of Another Ex. 1) If 2x – z = y, what is x in terms of y and z?

Examples A.2 B.3 C.6 D.8 E.12 B

Examples A.12 B.14 C.16 D.20 E.22 E

Examples A.-1 B.0 C.1 D.3 E.5 B

Examples D

E

A.x = -5 B.x = -4 C.x = -3 D.x = 4 E.x = 5 D

Examples 8

5