In 4 years time a mother will be three times as old as her son. four years ago she was five times as old as her son. find their present ages.

write as a simultaneous equations

4+3x=4+5x

Step-by-step explanation:

4+3x=4+5x

this is answer of 144 cubic meters

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,