rosa is 3 years older than her brother marco. let "x" stands for rosa's age and let "y" stands for marco's age . the linear equation of y= x -3 statse marcos age , y , in terms of rosas age , x .

a.when marco is 38, write the equation for rosa's age.

b.when marco is 72, write the equation for rosas age

i need help!

Question

rosa is 3 years older than her brother marco. let "x" stands for rosa's age and let "y" stands for marco's age . the linear equation of y= x -3 statse marcos age , y , in terms of rosas age , x .

a.when marco is 38, write the equation for rosa's age.

b.when marco is 72, write the equation for rosas age

i need help!

anonymous · Answer

the original equation:
y=x-3
If y is marco's age and that is 38
38=x-3, then just solve for x
Again, if y is marco's age and that is 72
72=x-3, just solve for x

anonymous · Answer

so 73 -3 ?? Cx

anonymous · Answer

plug in marco's age for the y, and solve.

anonymous · Answer

can someone solve it for me TT-TT

anonymous · Answer

What you want is Rosa's age. The problem says x is Rosa's age. What you need to do is leave the x along on one side of the equation.
From:
38=x-3
Since you have negative 3 along with the x, just add +3 to eliminate it (because -3+3=0)
BUT, in order for the equation to remain valid, add +3 to the other side of the equation too.
So:
38+3=x-3+3
And you have:
41=x

And solve the other one in the same way.

anonymous · Answer

ok