4(9) + 3s = 75
36 + 3s = 75
3s = 39
s = 13
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.
Answer:
546
Step-by-step explanation:
4x3^7=2187
so now its
2187=4x+3
subtract 3 from both sides
now its
2184=4x
divide both sides by 4
546=x