You have the following equations:
2(r +5) = 7r
3 (4d -3 ) = -2d + 5
In order to solve the previous equations, proceed as follow:
2(r +5) = 7r apply distribution property
2r + 10 = 7r subtract 2r both sides
10 = 7r - 2r
10 = 5r divide by 5 both sides
10/5 = r
2 = r
r = 2
3 (4d -3 ) = -2d + 5 apply distribution property
12d - 9 = -2d + 5 add 2d both sides
12d + 2d - 9 = 5 add 9 both sides
12d + 2d = 5 + 9 simplify both sides
14d = 14 divide by 14 both sides
d = 14/14
d = 1
Hence, the solutions to the given equations are r = 2 and d = 1