Solve each by elimination
4x - y = 105
x + 7y = -10

point form:

(25, -5)

Equation form:

x= 25, y= -5

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

is should be y = 5x

step-by-step explanation:

correct me if im wrong