Question

помогите решить уравнение плиз 5t+30-12t=42

Answer 1

$5t+30-12t=42$

 

$30-7t=42$

 

$7t=30-42$

 

$7t=-12$

 

$t=-12:7$

 

$t=-frac{12}{7}=-1frac{5}{7}$

Answer 2

5t+30-12t=42

-7t=42-30

-7t=12

t=-12:(-7)

t=-12/7

t=-1 5/7