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Sagot :
First, write this in linear equation:
Let x be the unknown number, it can be shown like this:
x+(-15)=+7
or
x-15=7
Transfer the 15 to the other side and change its sign: The -15 will become +15 after transferring to the other side.
x=7+15
Simplify it by doing the operations:
x=22
Check:
22+-15=7
22-15=7
7=7, Correct!
Therefore the number that must be added to -15 to produce +7 is 22.
Let x be the unknown number, it can be shown like this:
x+(-15)=+7
or
x-15=7
Transfer the 15 to the other side and change its sign: The -15 will become +15 after transferring to the other side.
x=7+15
Simplify it by doing the operations:
x=22
Check:
22+-15=7
22-15=7
7=7, Correct!
Therefore the number that must be added to -15 to produce +7 is 22.
[tex]Let\ x\ be\ the\ unknown\ number. \\ \\ Solution; \\ -15+x=7 \\ \\ x=7+15(Transpose\ 15\ to\ the\ other\ side.) \\ \\ \boxed{\boxed{x=22}} \\ \\ Checking; \\ Let\ \boxed{x\to22} \\ \\ -15+x=7 \\ \\ -15+22=7 \\ \\ \boxed{\boxed{7=7}}\ \underline{TRUE} \\ \\ Hope\ it\ Helps:) \\ Domini[/tex]
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