Question

Example: Use substitution to PLEASE find the solution

system & y = 2x - 35
6x + 3y = 15

Answer 1

put value of y in equation

6x + 3(2x-35) = 15

6x + 6x - 105= 15

12x = 15+105

x = 120/12

x = 10

now put value of x in first equation to find y

y = 2(10) -35

y = -15