Question

me pueden ayudar con éstas ecuaciones? porfiiis

-x + 7 = 0
2 + x = 6 - 4
2 x - 5 = 7
3 x = 21 - 6

Answer 1

• -x+ 7 = 0

-x = - 7

x = 7

• 2 + x = 6 - 4

x = 6 - 4 - 2

x = 0

• 2x - 5 = 7

2x = 7 + 5

x = 12 ÷ 2

x = 6

• 3x = 21 - 6

3x = 15

x = 15 ÷ 3

x = 5