KalistaBab KalistaBab

25-04-2019
Mathematics

contestada

Hello! Can someone help me with a substitution problem? Pre-Alg level.

3x+9y=42
y=2x

Respuesta :

barrettmartin36 barrettmartin36

25-04-2019

Answer:

x=2

Step-by-step explanation:

The equation becomes 3x+9(2x)=42. Then you distribute the 9 into the 2x. Combine 3x and 18x for 21x=42. Divide 21 by both sides and you get x=2.

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