(5a).7 = -23 7(5a) = -23 35a = -23 a = -23/35 a= -0.657 (3 d.p.)
2a+5a+9a = 16a
6a + 4 = 5a - 2 means that 6a - 5a = -2 - 4 which gives a = -6
A= 2
Oh, come on! 6a - 5a = a, 7 - 5 = 2
5a+5=6a-7
(5a).7 = -23 7(5a) = -23 35a = -23 a = -23/35 a= -0.657 (3 d.p.)
Divide 5a and 180 by 5. a = 36
Answer to: 5a + 1 = a - 3a = -1
5a = -5a + 5Add 5a to each side:10a = 5Divide each side by 10:a = 5/10 = 1/2
2a+5a+9a = 16a
If: 5a-1+a = 11 Then: a = 2
The statement is false. 5a +6 = 5a + 30 Subtract 5a from both sides: 6 = 30 and that is plain and simple rubbish!
a + 3a + 5a = 180 9a =180 a = 20
7a + 4 = 5a + 7 7a = 5a + 3 2a = 3 a = 3/2
6a + 4 = 5a - 2 means that 6a - 5a = -2 - 4 which gives a = -6
A= 2