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3 years ago

3p + q = 8 and 3p - q = 10 then p+q is?

Mathematics

2 answers:

belka [17]3 years ago

6 0

Answer:

Step-by-step explanation:

3p + q = 8

3p - q = 10

→ Minus the two equations away from each other which would cancel out 3p

2q = -2

→ Divide both sides by 2 to isolate q

q = -1

→ Substitute q = -1 back into 3p + q = 8

3p - 1 = 8

→ Add 1 to both sides to isolate p

3p = 9

→ Divide both sides by 3 to isolate p

p = 3

⇒ The question asks us to find p + q so,

3 + - 1

→ Remember the minus cancels out the plus

3 - 1 = 2

mafiozo [28]3 years ago

5 0

Answer:

Step-by-step explanation:

3p + q = 8 and

3p - q = 10

then p+q is?

--------

add up side-by-side:

6p=18 ⇒ p=3

q=8-3p= 8 - 9= -1

p+q= 3-1=2

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3p + q = 8 and 3p - q = 10 then p+q is?​

3p + q = 8 and 3p - q = 10 then p+q is?