Question

Resolva as equações na incógnita x:
a) 7(a+x)= 5a-2 (2a+x)
b)2a(x+c) -3ax=3a (x-2c)

Answer 1

A) 7(a+x) = 5a-2(2a+x)
7a+7x = 5a-2a-2x
7a+2a-5a= -2x-7x
4a= -9x                               

B)2a(x+c)-3ax = 3a(x-2c0
2ax+2ac-3ax = 3ax-6ac
2ax-3ax-3ax = -6ac-2ac
-4ax = -8ac 

Answer 2

A) 7a + 7x = 5a -4a - 2x
7x +2x = 5a-4a+7a
9x= 1a + 7a
9x = 8a

B) 2ax + 2c -3ax = 3ax - 6c
2ax -3ax - 3ax = -6c - 2c
- 1ax - 3ax = -8c
- 4ax = -8c