2x-y and 7y= -7 +3x solve by substitution

x = -7/11, y = -14/11

Step-by-step explanation:

2x = y (1)

7y = -7+3x (2)

from (1)

2x = y

y = 2x (3)

substitute (3) into (2)

7y = -7+3x

7(2x) = -7+3x

14x = -7+3x

14x-3x = -7

11x = -7

x = -7/11

substitute x = -7/11 into (3)

y = 2x

y = 2(-7/11)

y = -14/11

x = -7/11, y = -14/11

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign

42

step-by-step explanation: