menillo
menillo
26-02-2017
Mathematics
contestada
8.5x + 12y=1656 where x+y=152
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earobinson
earobinson
26-02-2017
Rearrange x+y=152 for either x or y and then substitute that new equation into 8.5x + 12y = 1656 and solve.
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sdmatera
sdmatera
26-02-2017
You can also elimination by multiplying the second equation by 12 in order to subtract the y's and get 3.5x=168, so x=48. Then you plug into the original to get y=152-48 or 104
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