Question

x/10 + y/5 +1 = 15 and x/8 + y/6 =15 . solve the following linear equation by cross multiplying . ​

Answer 1

Answer:

hence, the value of x=80 and value of y=30

Step-by-step explanation:

x/10 +y/5 +1= 15

(x+2y)/10=14

x+2y=140

x+2y-140=0. eq.1

x/8 +y/6 = 15

(3x + 4y)/24 = 15

3x+ 4y =360

3x+4y -360=0. eq.2

a1=1,a2=3,b1=2,b2=4,c1=-140,c2=-360

by using cross multiplying we get

x/(b1×c2-b2×c1) =y/(c1×a2-c2×a1)=1/(a1×b2-a2×b1)

x/-160 = y/-60 = 1/-2

on solvin the above,we get

x=80 ,y=30

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