Add. [12 − 6] [−2 14] (matrix format)
[ 1 − 10] + [ 5 15]
a)[−14 − 8]
[ 6 − 5]
b)[10 6]
[ 8 5]
c)[10 8]
[ 6 5]
d)[−14 − 6]
[ 8 − 5]

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!