15:7: :60:x , so x = ?
Answers
Answer:
Explanation:
When you are faced with trying to solve a proportion like this, the method involves first doing a "cross-multiplication". What you are really doing is multiplying the left and right side by both denominators (I mention that just so it doesn't look like you are doing some sort of trick operation), with one of the multipliers used to cancel the denominator on that side of the equation.
15
×
x
=
60
×
7
Now, isolate the
x
variable by dividing each side by 15
x
=
60
×
7
15
=
28
It is one of the truly useful "rules" of algebra, that you can perform any operation you like on an equation. As long as you do it identically to both sides, the equation remains true.
Answer:
x = 28
Step-by-step explanation:
1. Use proportion.
2. Product of extremes = Product of means
3. Do linear equation.