Answer:
1. 0
2. 0
3. 0
Step-by-step explanation:
6x + 18 = 3(2x + 7) - 3
open the brackets by using 3 to multiply the bracket behind it
6x + 18 = 6x + 21
collect like terms. when + crosses = sign it changes to -
6x - 6x = 21 - 18 - 3
0 = 21 - 21
0
4(0.5a + 3) = 2a + 12
multiply contents of the bracket with 4
2a + 12 = 2a + 12
collect like terms. when + crosses = sign it changes to -
2a - 2a = 12 - 12
0
x + 4 - 6x = 6 - 5x - 2
collect like terms. when + crosses = sign it changes to -
x + 5x - x = 6 - 4 - 2
6x - 6x = 6 - 6
0
