Question

hallar el valor de x .
a: 2×+4=×-1
b: 4×+2=3×-5
c:5×+2=10×+13
d:12×-4=10×

Answer 1

a:
$2x+4=x-1 \\ 2x-x=-1-4 \\ x=-5$

b:
$4x+2=3x-5 \\ 4x-3x=-5-2 \\ x=-7$

c:
$5x+2=10x+13 \\ 5x-10x=13-2 \\ -5x=11 \\ x=- \frac{11}{5}$

d:
$12x-4=10x \\ 12x-10x=4 \\ 2x=4 \\ x= \frac{4}{2} \\ x=2$

Answer 2

2x + 4 = x - 1
2x - x = - 1 - 4
x = - 5

4x + 2 = 3x - 5
4x - 3x = - 5 - 2
x = - 7

5x + 2 = 10x + 13
5x - 10x = 13 - 2
- 5x = 11
x = 11/-5

12x - 4 = 10x
12x - 10x = 4
2x = 4
x = 4/2
x = 2