Solve the system of linear equations below.

x − 3y = -3
x + 3y = 9

A. x = -12, y = 7

B. x = 3, y = 2

C. x = 6, y = 1

D. x = 6, y = 2

the correct answer is B: x=3, y=2

Step-by-step explanation:

x-3y=-3(1)

x+3y=9(2)

using elimination method.

We eliminate x by introducing subtraction

x-3y=-3

-

x+3y=9

the single equation becomes

0-6y=-12

-6y=-12

Minus cancelled each other

6y=12

y=12/6

y=2

to find x substitute y=2 in equation 1

x-3y=-3

x-3(2)=-3

x-6=-3

x=-3+6

x=3

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%

inch

step-by-step explanation:

yard and mile are too big.