Question

solve the following simultaneous equation: p = 2q - 1, q = 5 - 3p​

Answer 1

Answer:

q=8/7

p=9/7

Step-by-step explanation:

p=2q-1

q=5 - 3p

substituting the value of p from eq1 to eq2

q=5-3(2q-1)

q=5-6q+3

7q=8

q=8/7

now put this value of q in eq1

p=2(8/7)-1

p=(16-7)/7

p=9/7

Answer 2

Answer:

P = 9/7  and Q = 8/7

Step-by-step explanation:

From the data,

p = 2q - 1 ( say eqn 1 )  and q = 5 - 3p ( say eqn 2 )

substitute eqn 2 in eqn 1

so that,

p = 2( 5 - 3p ) - 1

p = 10 - 6p -1

p = 9/7

Put p value in any one of the eqns,

hence you get Q = 8/7