1)12-4(x-3)=39-9x
2)2(3x+5)-3(4x-1)=11,8
12 - 4*(x-3) = 39 - 9x
12 - 4x + 12 = 39 - 9x
24 - 4x = 39 - 9x
-4x + 9x = 39 - 24
5x = 15
x= 3
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2 * (3x+ 5 ) - 3*(4x-1) = 11.8
6x + 10 - 12x + 3 = 11.8
-6x + 13 = 11.8
-6x = 11.8 - 13
-6x = -1.2
x = 0.2
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