Respuesta :

eleanordewfall

Answer:

listed below:

Step-by-step explanation:

1) x + 234 = 867

-234 | -234

x = 633

2) 7t + 11 = 74

-11 | -11

7t = 63

÷7 | ÷7

t = 9

3) 3x + 7x = 120

3x + 7x = 10x.

10x = 120

÷10 | ÷10

x = 12

lmk if you need any help with explanations <3