Question

if the ordered pairs (a+7,4)(3,4 a+b) are equal then ( a,b) is

a) (4,20)
b) (20,4)
c) (-4,20)
d) (20,-4)

solution : ​

Answer 1

Hey there,

here's your answer

=> (a+7,4)= (3,4a+b)

=>a+7=3

=>a= -4

=>4a+b= 4

=>4(-4)+b=4

=> -16+b=4

=>b=20

then, (a,b) = (-4,20)

therefore, (c) is the answer

hope it helps