Question

5 (a+3) -a = - (4a-6) +1​

Answer 1

Resposta:

$5(a + 3) - a = - (4a - 6) + 1 \\ 5( {a}^{2} + 3a) = - 4a + 7 \\ 5 {a}^{2} + 3a + 4a - 7 \\ 5 {a}^{2} + 7a - 7 = 0$

Answer 2

5 (a+3) -a = - (4a-6) +1
5a+15 -a = - (4a-6) +1
4a+ 15 = - (4a-6) +1
4a+ 15 = -4a+6 +1
4a- 4a = 15+6 +1
-8a = 22
a= 8/22
a=2.75