Collect like terms: 9a -7a = 9 - 15, ie 2a = -6, so a = -3
7a + 6 = -36 Subtract 6 from both sides: 7a = -42 Divide both sides by 7: a = -6 a = -6
eleven! doo doo doo doot
7a + 10 = 2a 7a = 2a -10 5a = -10 a = -2
a2 + 7a - 8a2 = 6a7 ∴ a2 + 7a - 8a2- 6a7 = 0 ∴ a + 7 - 8a - 6a6 = 0 ∴ 7 - 7a - 6a6 = 0 ∴ 6a6 + 7a - 7 = 0
7a-17 = 4a+1 7a-4a = 1+17 3a = 18 a = 6
(7a=3)=(-a-5)=16
555
7a + 4 = 5a + 7 7a = 5a + 3 2a = 3 a = 3/2
9a-a = 19+7a 8a = 19+7a 8a - 7a = 19 + 7a - 7a 1a = 19 a = 19
18
It's a simple linear equation in 'a'.If you want to know the value of 'a' that makes the equation true,you can find it as follows:7a + 3 = 21Subtract 3 from each side:7a = 18Divide each side by 7:a = 18/7
-7a+2a+9 is also -5a+9. -5a+9=24. -5a=15. a=-3.
Collect like terms: 9a -7a = 9 - 15, ie 2a = -6, so a = -3
7a + 6 = -36 Subtract 6 from both sides: 7a = -42 Divide both sides by 7: a = -6 a = -6
eleven! doo doo doo doot
7a2 + 53a + 28 = 7a2 + 49a + 4a + 28 = 7a(a + 7) +4(a + 7) = (a + 7)(7a + 4)