Question

Solve the equation, if possible. Determine whether the equation has one solution, no solution, or infinitely many solutions.

1.) 7y+13=5y-3

2.) 8+9p=9p-7

3.) 3(7r-2)=21r-6

4.) 2(3x+6)=3(2x-6)

Answer 1

1) 7y+13 = 5y - 3

7y-5y = -13 -3

2y = -10

y = -10÷2

y = -5



2 ) no solution

3) no solution

4 ) no solution




in second equation 9p and 9p will cancel each other
in third equation 21r and 21r will cancel each other
in fourth equation 6x and 6x will cancel each other