-1.3*(7+4x)-11=-4.5
– 9.1 – 5.2x – 11 = – 4.5
– 5,2x = – 4,5 + 11 + 9,1
-5.2x = 15.6
x = -3
-2.8*(3x+7)-4.2=1.4
– 8.4x – 19.6 – 4.2 = 1.4
– 8,4x = 1,4 + 4,2 + 19,6
-8.4x = 25.2
-1.3*(7+4x)-11=-4.5
– 9.1 – 5.2x – 11 = – 4.5
– 5,2x = – 4,5 + 11 + 9,1
-5.2x = 15.6
x = -3
-2.8*(3x+7)-4.2=1.4
– 8.4x – 19.6 – 4.2 = 1.4
– 8,4x = 1,4 + 4,2 + 19,6
-8.4x = 25.2
x = -3