Question

The expression ax+by has value 7 when x=2,y=1.when x=-1,y=1,it has value 1 , find a and b

Answer 1

Answer:

we can find it by substitution method

Step-by-step explanation:

the equations so formed are -

2a + b = 7 ..... (i)

a + b = 1 ..... (ii)

taking (ii)

we get,    b = 1 - a ..... (iii)

by substituting the value of b in (i)

2a + 1 - a = 7

a = 7 - 1

a = 6

putting the value of a in (iii)

b = 1 - a

b = 1 - 6

b = -5

therefore, we get a = 6 and b = -5

we can also verify it

HOPE IT HELPS YOU!