Find the value of 7 - 2x When x=-3

13

Explanation:

given 7 - 2x

if x=-3

7-2(-3) = 7+6 = 13

Step-by-step explanation:

when x = - 3

7 - 2x

= 7 - 2 *( - 3)

= 7 + 6

= 13

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

answer: 414,377,008

step-by-step explanation:

just multiply it