Question

Como resolver?
a 5x = 4 x 78
b 2x=5+6x
c 2x=8
d 5x=-30
e 3x=1
f 10x=-10
g 7x-5=2x


Gerte a pra amanha por favor

Answer 1

5x = 4 * 78
5x = 312
x = 312/5
x = 62,4

2x = 5 + 6x
- 5 = 6x - 2x
- 5 = 4x
- 5/4 = x

2x = 8
x = 8/2
x = 4

5x = - 30
x = - 30/5
x = - 6

3x = 1
x = 1/3

10x = - 10
x = - 10/10
x = - 1

7x - 5 = 2x
7x - 2x = 5
5x = 5
x = 5/5
x = 1