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1 = 0.76r - 9 - 0.36r
1 + 9 = 0.76r - 0.36r
Simplify like terms
10 = 0.4r
Solve for r
r = 10/0.4
r = 25
Result
r = 25
b)
[tex]\begin{gathered} \text{ -5 = }\frac{1}{4}z\text{ - 20 + }\frac{1}{2}z \\ \text{ -5 + 20 = }\frac{1}{4}z\text{ + }\frac{1}{2}z \\ \text{ 15 = }\frac{1\text{ + 2}}{4}z \\ \text{ 15 = }\frac{3}{4}z \\ \text{ 15x4 = 3z} \\ \text{ 60 = 3z} \\ \text{ z = }\frac{60}{3} \\ \text{ z = 20} \end{gathered}[/tex]Result
z = 20
