L+s=9;1.5L+.9s=10.5

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Solution for L+s=9;1.5L+.9s=10.5 equation: 



+L=91.5+.9L=10.5

We move all terms to the left:

+L-(91.5+.9L)=0

We add all the numbers together, and all the variables

L-(.9L+91.5)=0

We get rid of parentheses

L-.9L-91.5=0

We add all the numbers together, and all the variables

0.1L-91.5=0

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

0.1L=91.5

L=91.5/0.1

L=915

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