25 + ( x - 2 ) * 15 =70 72 : ( 12 - x :4 ) = 9

Предыдущий
вопрос Следующий
вопрос

To solve the first equation:

25 + (x - 2) * 15 = 7
Simplify
25 + 15x - 30 = 7
Combine like terms
15x - 5 = 7
Add 5 to both sides
15x = 7
Divide by 15 on both sides
x = 5

Now, let's solve the second equation:

72 : (12 - x : 4) =
First, simplify the expression inside the parentheses
72 : (12 - x/4) =
Now combine the terms inside the parentheses
72 : (12 - 5/4) =
Calculate 12 - 5/4
12 - 5/4 = 48/4 - 5/4 = 43/4

Now substitute back in the expression
72 : 43/4 =
To divide by a fraction, we can multiply by the reciprocal
72 4/43 =
288 / 43 =
43 9 = 28
288 = 288

Therefore, the solution to the second equation is verified.