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Given the following equation, substitute (3x + 4) in for y, and solve for x.
7x + 6y = 99

1 Answer

6 votes

Answer:

x=3

Explanation:

Distribute

7x+6(3x+4)=99

7x+18x+24=99

Combine like terms

7x+18x+24=99

25x+24=99

Subtract 24 from both sides

25x+24=99

25x=75

Divide both sides by the same factor

25x=75

x=3

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