0.15(x-9)+3.2(x-6.5)=0.12(x-31)-68.68-4.7(x-36)
0.15x – 1.35 + 3.2x – 20.8 = 0.12x – 3.72 – 68.68 – 4.7x + 169.2
0,15x + 3,2x – 0,12x + 4,7x = 169,2 – 68,68 – 3,72 + 20,8 + 1,35
7.93x = 118.95
x = 15
0.15(x-9)+3.2(x-6.5)=0.12(x-31)-68.68-4.7(x-36)
0.15x – 1.35 + 3.2x – 20.8 = 0.12x – 3.72 – 68.68 – 4.7x + 169.2
0,15x + 3,2x – 0,12x + 4,7x = 169,2 – 68,68 – 3,72 + 20,8 + 1,35
7.93x = 118.95
x = 15