Question

how to solve and find value of A and B if equations are A + 2B = 60 and A + 4B = 90​

Answer 1

Answer:

A=30

B=15

Step-by-step explanation:

A+2B=60

A=60-2B (1)

A+4B=90 (2)

Substituting equation (1) in (2)

60-2B+4B=90

60+2B=90

2B=90-60

2B=30

B=30÷2

B=15

Substituting B=15 in equation (1)

A+2×15=60

A+30=60

A=60-30

A=30

A=30

B=15