SOLUTION: How to solve this system of linear equation by the substitution method step by step? 4x+6y=2340 x+y=480

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Question 674949: How to solve this system of linear equation by the substitution method step by step? 4x+6y=2340
x+y=480
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
4x+6y=2340
x+y=480
...
solve for x
x = 480-y
...
substitute into the first equation
4(480-y) + 6y = 2340
...
1920 - 4y + 6y = 2340
...
2y = 2340-1920
2y = 420
highlight_green%28y+=+210%29
...
Plug the y valute into the x+y=480 equation
x + 210 = 480
x = 480 - 210
highlight_green%28x+=+270%29
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