Question

A+b+c+100=350 if a=2b and b=2c what is the value of c

Answer 1

a+b+c+100=350
or, a+b +c =350-100=250
or, 2b+b+c=250 {as a=2b}
or, 3b+c=250
or, 3×2c+c=250 {as b=2c}
or, 7c=250
or, c=250÷7

Answer 2

a+b+c=250
a=2b
b=2c
so, a=4c
using all in 1st eq
4c+2c+c=250
7c=250
c=250/7
have fun ☺☺