Question

mx + ny = 4mn; mx – ny = 0

solve with cross multiplication method
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Answer 1

Answer:

x = 2n & y = 2m

Step-by-step explanation:

Here,

mx + ny  = 4mn    eqn(1)

mx - ny = 0    eqn(2)

subracting equation (2) from eqn(1)

we have,

2mx = 4mn

x = 2n (cross multiplication applied here)

now, putting the value of x in any of the above equation we get,

y = 2m (cross multiplication applied here)

so, x = 2n & y = 2m

Answer 2

I hope it helps you.

mx+ny = 4mn. -----equation 1.

mx - ny = 0

mx = ny -----equation 2.

the value of mx put in equation 1

ny+ny = 4mn

2ny = 4mn

y = 4mn/2n

y = 2m

the value of y put in equation 2

mx = n2m

x = 2nm/m

x = 2n