SOLUTION: I'm wondering how to solve the equation "D-25=78"? I'm just confused on how to subtract equations like these..

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Question 1089377: I'm wondering how to solve the equation "D-25=78"?
I'm just confused on how to subtract equations like these..
Found 3 solutions by josgarithmetic, MathLover1, ikleyn:
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
On left you see, D-25.
How do you undo this? ADD 25 TO BOTH SIDES.

D-25=78
D-25%2B25=78%2B25
Continue.....

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

D-25=78...here, you have unknown variable D and you need to find what is D equal to
first add 25 to both sides
D-25%2B25=78%2B25
D-cross%2825%29%2Bcross%2825%29=78%2B25
D=78%2B25...now we have D on one side and 78%2B25(add them)
D=103

Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.
On solving linear equations, see the lesson
    - HOW TO solve a linear equation
in this site.