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19x-22*7x=30
We move all terms to the left:
19x-22*7x-(30)=0
Wy multiply elements
19x-154x-30=0
We add all the numbers together, and all the variables
-135x-30=0
We move all terms containing x to the left, all other terms to the right
-135x=30
x=30/-135
x=-2/9
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