Question

AYUDAAAAAA ecuaciones.
1- -4×+21=+3×-35.
2- +3×-6=+×-20.
3- +5×+8= -3×+40.
4- -×-7=+2×+23.
5- +6×+4=+2×+48.
6- -3×+12=+3×-36.
7- +8×-20=-2×+70.
8- -6×+9=+3×+72.
9- +10×-8=+6×-32.
10- -×+18=×-10.
11- -5×+8= -3×-20.
12- +3×-+2×-8.
13- +2×+12= -2×+32.
14- -×+5=+×-5.
15- +4×+10= -×+25.
16- -3×+12=+3×+48.
17- +×+14= -6×+56.
18- -2×+9=+×+45.
19- +4×-15=+×+60.
20- -6×-8=+2×-24.​

Answer 1

-4×+21 = 3x-35

21 + 35 = 3x + 4x

56 = 7x

56/7 = x

8 = x

+3x-6 = +x-20.

3x - x = -20 + 6

2x = -14

x  = - 14/2

x  = - 7

+5x + 8 = -3x + 40.

5x + 3x = 40 - 8

8x = 32

x = 32/8

x = 4

- x - 7 =+2x + 23

-7 - 23 = 2x + x

-30 = 3x

-30/3 = x

-10 = x

Eternamente axllxa