Answer:
[tex]r=16[/tex]
Step-by-step explanation:
[tex]5(r + 4) = -12 + 7r[/tex]
➠ Use the distributive property to multiply 5 by r +4:
[tex]5r+20=-12+7r[/tex]
➠ Subtract 7r from both sides:
[tex]5r+20-7r=-12[/tex]
➠ Combin 5r and -7r to get -2r:
[tex]-2r+20=-12[/tex]
➠ Subtract 20 from both sides:
[tex]-2r=-32[/tex]
➠ Divide both sides by -2:
[tex]r=\frac{-32}{-2}[/tex]
[tex]r=16[/tex]
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