Solve the linear system of equations using the linear combination method.

{8a−4b=205a−8b=62

Step 1:

Line up respective variables in column.

.................(1)

.................................(2)

Step 2:

We need to multiply first equation with -2 so that the coefficient of b becomes equal and opposite of -8.

*2

...................(3)

Step 3:

Add equation (2) and (3)

The b terms will cancel out and we are left with only a terms.

-11a = 22

dividing both sides by -11

a=-2

Step 4:

plug this value of a in equation (1) to find value of b,

b=-9

Answer : a=-2 and b =-9

the answer is 96 degrees

step-by-step explanation:

you have to realize that a line equals 180 degrees