1.

16x +12y =56 and 9x+12y =69 elimination method

Answer»

Step-by-step explanation:

first simplify these eqns by dividing by 4 and 3 respectively

we get 4x+3y=14 1

and 3x+4Y=21 2

here for eliminating any VARIABLE take the value of that variable from one eqn and put it into 2nd eqn

we will get the result

by 1st eqn we get X=(14-3y)/4

on substituting this in 2nd eqn

[3(14-3y)/4] + 4y= 21

on multiplying the eqn by 4

we get 42-9y+16y=84

y=6

now we know the value of x in TERMS of y

so we substitute value of y in that expression

x=-1

if you CANT understand even after this please try yourself

you will definately get the clarity


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