Question

learn with an example or watch a video
how many solutions does this equation have?
$-5r - 7 = -6r$
no solution
one solution
infinitely many solutions

Explanation:

Step1: Isolate variable terms

Add $6r$ to both sides:
$-5r + 6r - 7 = -6r + 6r$
$r - 7 = 0$

Step2: Solve for $r$

Add 7 to both sides:
$r - 7 + 7 = 0 + 7$
$r = 7$

Answer:

one solution