Question

7p-2q = 15
2p + 4q = 18​

Answer 1

Answer:

Solve equation [2] for the variable q

[2] 4q = -7p + 27

[2] q = -7p/4 + 27/4

// Plug this in for variable q in equation [1]

[1] 3p + 6•(-7p/4+27/4) = 18

[1] -15p/2 = -45/2

[1] -15p = -45

// Solve equation [1] for the variable p

[1] 15p = 45

[1] p = 3

// By now we know this much :

p = 3

q = -7p/4+27/4

// Use the p value to solve for q

q = -(7/4)(3)+27/4 = 3/