Which equation shows the substitution method being used to solve the system of linear equations?

x – y = 7
x = y + 3

a.
x – y = y + 3

b.
(y + 3) – y = 7

c.
x = (7 – x) + 3

d.
x – (y + 3) = 7

if you mean

then it's c. 8, -7/3

but if you mean

then it is

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1