5) k/35=3/7 : cross multiply
35*3=7k : simplify
105=7k : divide both sides of the equation by 7
k=15
6) 3/t=18/24 :cross multiply
18t=24*3 :simplify
18t=72 : divide both sides of the equation by 18
t=4
7) 10/8.4 = 5/m :cross multiply
10m=5 * 8.4 :simplify
10m=42 :divide both sides by 10
m=4.2
Answer:
a=8/2
a=4
Step-by-step explanation:
Answer:
- Variable x in first equation
Step-by-step explanation:
<u>Given system</u>
Variables in this system are x and y.
Isolating a variable means rearranging the equation so that a variable of our interest is on its own in one side of the equal sign.
We see <u>variable x is isolated </u>in the first equation.
In the second equation both of the variables are on the same side so they are not isolated.
