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(7-(2*x))/4 = (3*(x+5))/9 // - (3*(x+5))/9
(7-(2*x))/4-((3*(x+5))/9) = 0
(7-2*x)/4+(-1/3)*(x+5) = 0
(7-2*x)/4-1/3*(x+5) = 0
(7-2*x)/4+(-1/3*4*(x+5))/4 = 0
7-1/3*4*(x+5)-2*x = 0
1/3-10/3*x = 0
(1/3-10/3*x)/4 = 0
(1/3-10/3*x)/4 = 0 // * 4
1/3-10/3*x = 0
1/3-10/3*x = 0 // - 1/3
-10/3*x = -1/3 // : -10/3
x = -1/3/(-10/3)
x = 1/10
x = 1/10
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