0.9c+0.5c=7

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Solution for 0.9c+0.5c=7 equation: 



0.9c+0.5c=7

We move all terms to the left:

0.9c+0.5c-(7)=0

We add all the numbers together, and all the variables

1.4c-7=0

We move all terms containing c to the left, all other terms to the right

1.4c=7

c=7/1.4

c=5

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