Question

One book weighs 350g and one notebook weighs 250g. The weight of x books and y
notebooks is--------------

Answer 1

Answer:

may be the answer is 500g

Answer 2

Answer:

x=250 and y=100

Step-by-step explanation:

x+y=350 1st equation

x-y=250. 2nd equation

subtract the equation as you do subtraction

see when we will subtract both x will be cancelled because both x are of positive (+-=-). so x x will be cancelled..

then one y is of positive and another one is of negative so they will be added ..so it will come 2y.

350is of positive and 250 is also of positive so it will be subtracted .. now you may bee thinking how I have told you that we have to subtract both the equation so + - = - .. 350-250=200

2y = 200

y= 200÷2

y=100

put the value of y in any equation

I am putting in 1st equation

x+100=350

x=350-100

x=250

verify

x+ y = 350

put both the value

250+100=350

350=350

LHS=RHS