Answer:
Step-by-step explanation:
1). s = [tex]\frac{3x+t}{r}[/tex]
r.(s) = [tex]r.(\frac{3x+t}{r})[/tex]
rs = 3x + t
rs - t = 3x
[tex]\frac{rs-t}{3}=\frac{3x}{3}[/tex]
[tex]\frac{rs-t}{3}=x[/tex]
[tex]x=\frac{1}{3}(rs-t)[/tex]
2). 5ax + b = c
(5ax + b) - b = c - b
5ax = c - b
[tex]\frac{5ax}{5a}=\frac{c-b}{5a}[/tex]
x = [tex]\frac{1}{5}(\frac{c-b}{a})[/tex]
