4a + a = 25 add 4a and a 5a = 25 then divide 25 by 5 a = 5
11a+9 = 4a+30 11a-4a = 30-9 7a = 21 Solution: a = 3
4a - 2.1 = 9a + 5.4 4a - 9a = 5.4 +2.1 -5a = 7.5 -a = 1.5 a = -1.5
4a - 9 = 27 4a = 36 a = 9
a2 - 4a + 4
Solve the following equation for A : 2A/3 = 8 + 4A
4a + a = 25 add 4a and a 5a = 25 then divide 25 by 5 a = 5
9=4a+13 9-13=4a -4=4a -4/4=a -1=a a=-1
11a+9 = 4a+30 11a-4a = 30-9 7a = 21 Solution: a = 3
The question contains neither an expression nor an equation (or inequality). There can, therefore be no sensible answer.
9a + 4a = 26 13a = 26 a = 26/13 a = 2
4a - 2.1 = 9a + 5.4 4a - 9a = 5.4 +2.1 -5a = 7.5 -a = 1.5 a = -1.5
8a+4a=144 12a=144 12a/12=144/12 A=144
a + 4 = 10(a + 4) - 4 = 10 - 4a = 6
It is -44 + 4a
4a - 9 = 27 4a = 36 a = 9
Add the equations: 4a + 4a - 5b + 5b = 7 + 17 ie 8a = 24 a = 3, so b = 1