Answer:
<h2>x = 17</h2>
Step-by-step explanation:
3(x - 7) = 30 is our equation, since we take 7 away from the number and then multiply the result by 3.
3x - 21 = 30
Add 21
3x = 51
Divide by 3
x = 17
To check.
3(17 - 7(
3(10)
30 = 30 Correct
Besides posting the answers, I also included the solution to solve similar simplification of algebraic expressions questions. :)
Just divide 640/11 = 58.2
58.2 miles/hours
Hope this helps!
The y intercept is found by putting x = 0 and calculating y, and vice versa.
y intercept:-
3(0) + 8y = 14 ; 8y =14; so y = 14/8 = 7/4
x intercept:-
3x + 8(0) = 14 ; 3x = 14; x = 14/3