1.6(a-4)-0.6=3(0.4a-7)
1.6a – 6.4 – 0.6 = 1.2a – 21
1,6a – 1,2a = – 21 + 0,6 + 6,4
0.4a = -14
a = -35
1.6(a-4)-0.6=3(0.4a-7)
1.6a – 6.4 – 0.6 = 1.2a – 21
1,6a – 1,2a = – 21 + 0,6 + 6,4
0.4a = -14
a = -35