Respuesta :
Start by multiplying out the 5
5x + 100 = 7x + 30
Subtract 5x from both sides
100 = 2x +30
Subtract 30 from both sides
70 = 2x
Divide by 2
x=35
5x + 100 = 7x + 30
Subtract 5x from both sides
100 = 2x +30
Subtract 30 from both sides
70 = 2x
Divide by 2
x=35