Question

explain the steps in the box plzzzzz

Answer 1

hi there✋✋✋✋

In side AC,
AD=3x and DC=5y
and AC=42cm

Since AC=AD+DC
So, 42=3x+5y

From the above 1st equation we put 3y in place of x.

So 3(3y)+5y=42
14y=42
y=3

Thanks♥❤❤#Followme♥♥❤

Answer 2

the equation 5y + 3x =42 is given in question.
now
the value of x is find in equation 1
x=3y
putting it in equation
5y+3x=42
5y +3*3y =42
5y + 9y =42
14y=42
y=42/14
y=3
$.$