What does the y equal in the system of equations y= 2x-7 and 5x+2=4

y = -31/5

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtract Property of Equality

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

y = 2x - 7

5x + 2 = 4

Step 2: Solve for x

Define equation:                     5x + 2 = 4Subtract 2 on both sides;       5x = 2Divide 5 on both sides:          x = 2/5

Step 3: Solve for y

Define equation:                     y = 2x - 7Substitute in x:                        y = 2(2/5) - 7Multiply:                                   y = 4/5 - 7Subtract:                                  y = -31/5