Asked by ggift
solve by using the properties of equality:
4x - 18 = 65
wouldn't x = 7
4x - 18 = 65
wouldn't x = 7
Answers
Answered by
Reiny
no
how did you get x=7 ?
4x - 18 = 65
add 18 to both sides
4x - 18 + 18 = 65 + 18
4x = 83
divide both sides by 4
x = 83/4 (not even anywhere close to 7)
how did you get x=7 ?
4x - 18 = 65
add 18 to both sides
4x - 18 + 18 = 65 + 18
4x = 83
divide both sides by 4
x = 83/4 (not even anywhere close to 7)
Answered by
ggift
i thought that it would be 7 because when i subtracted 18 from 65 i got 47 and 7 was missing from 4x
Answered by
MathMate
The interpretation of 4 and x in the expression "4x" as digits is used occasionally in mathematics, but more an exception than the rule.
In algebra, the multiplication sign is omitted when we multiply together two mathematical symbols or a number and a mathematical symbol.
For example,
xy is the same as x*y, and
4z equals 4*z.
It's the same principle as when we say 3 apples meaning 3 times the apples.
However, when we deal with two numbers, the multiplication sign is obligatory.
In algebra, the multiplication sign is omitted when we multiply together two mathematical symbols or a number and a mathematical symbol.
For example,
xy is the same as x*y, and
4z equals 4*z.
It's the same principle as when we say 3 apples meaning 3 times the apples.
However, when we deal with two numbers, the multiplication sign is obligatory.
Answered by
ggift
Oh, okay, thank you for explaining it to me.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.