Kaitlyn solved the question for x using the following calculations

-5.4+x=12.2
-5.4 -5.4

X=6.8

What error if any what did she make

A:she should have added 5.4 to each side
B: she should have added the inverse of 5.4 to each side
C:she should have computation error when she subtracted 5.4 form 12.2
D: she should have added 12.2 to each side.

A she should have gotten 17.6 instead of 6.8

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)