1)0,5x+3=0,2x 2)-0,4a-14=0,3a 3)4,7-8z=4,9-10z

Question

1)0,5x+3=0,2x
2)-0,4a-14=0,3a
3)4,7-8z=4,9-10z

Answer 1

1)
0.5x + 3 = 0.2x
0.3x = -3
x = -10
2)
-0.4a - 14 = 0.3a
-0.7a = 14
a = -20
3)
4.7 - 8z = 4.9 - 10z
2z = 0.2
z = 0.1