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4 votes
What is this math problem?
3x = 6y - 21
6x - 9y = -30

2 Answers

1 vote

Answer:

x=1 and y=4

Explanation:

Let's solve your system by substitution.

3x−6y=−21;6x−9y=−30

Step: Solve3x−6y=−21for x:

3x−6y=−21

3x−6y+6y=−21+6y(Add 6y to both sides)

3x=6y−21

x=2y−7

Substitute2y−7for x in6x−9y=−30:

6x−9y=−30

6(2y−7)−9y=−30

3y−42=−30(Simplify both sides of the equation)

3y−42+42=−30+42(Add 42 to both sides)

3y=12

y= 4

Substitute4foryinx=2y−7:

x=2y−7

x=(2)(4)−7

x=1(Simplify both sides of the equation)

User Champ
by
7.9k points
4 votes

Answer 1: x=2y−7

Answer 2: x= 3/2y -5

Heart if this helped

User Mariusz Jamro
by
7.6k points

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