What is the solution to this system of linear equations?
y - 4x=7
2y + 4x = 2
(3,1)
(1,3)
3.-1)
(-1,3)

(- 1, 3 )

Step-by-step explanation:

Given the 2 equations

y - 4x = 7 → (1)

2y + 4x = 2 → (2)

Eliminate x by adding the 2 equations term by term

(y + 2y) + (- 4x + 4x) = (7 + 2), that is

3y = 9 ( divide both sides by 3 )

y = 3

Substitute y = 3 in either of the 2 equations and solve for x

Using (2), then

(2 × 3) + 4x = 2

6 + 4x = 2 ( subtract 6 from both sides )

4x = - 4 ( divide both sides by 4 )

x = - 1

Solution is (- 1, 3 )

c

step-by-step explanation:

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%