The work of a student to solve the equation 3(2x - 4) = 8 + 2x + 6 is shown below:

Step 1: 3(2x - 4) = 8 + 2x + 6
Step 2: 5x-7 = 14 + 2x
Step 3: 5x - 2x= 14 + 7
Step 4:3x = 21
Step 5: X= 7

In which step did the student first make an error and what is the correct step? (5 points)
Step 2: 6x - 12 - 14 - 2x
Step 2: 6x - 7 = 246 + x + 4)
Step 3: 5x-2x = 14-7
Step 3: 5x + 2x = 14 + 7
.

y=mx+b

step-by-step explanation:

m slope, b y-intercept

goog may have it for you

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1