Mathematics, 17.03.2021 23:40 maddie1776

5x+7 y=-19 y=-3x-21
find x and y please show your work.

Answers: 1

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Answers

Answer from: Herbie3070

(-8, 3)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Distributive Property

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of Equality

Algebra I

Terms/CoefficientsCoordinates (x, y)Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define

5x + 7y = -19

y = -3x - 21

Step 2: Solve for x

Substitution

Substitute in y: 5x + 7(-3x - 21) = -19[Distributive Property] Distribute 7: 5x - 21x - 147 = -19Combine like terms: -16x - 147 = -19[Addition Property of Equality] Add 147 on both sides: -16x = 128[Division Property of Equality] Divide -16 on both sides: x = -8

Step 3: Solve for y

Define original equation: y = -3x - 21Substitute in x: y = -3(-8) - 21Multiply: y = 24 - 21Subtract: y = 3

Answer from: Quest

you can not drow on this

step-by-step explanation:

Answer from: Quest

the barter

Which of the following is not a store of value?

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5x+7 y=-19 y=-3x-21
find x and y please show your work....