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Slav-nsk [51]
3 years ago
13

write an equation to represent the relationship "a number decreased by negative 2 is equal to 21."Then solve the equqtion

Mathematics
2 answers:
Debora [2.8K]3 years ago
8 0
X - (-2) = 21 <== ur equation
x + 2 = 21
x = 21 - 2
x = 19
mars1129 [50]3 years ago
8 0
If it is a number (n) decreased by -2 is equal to 21 then the equation would be
21=n-2
To find n you would add 2 to the other side so 21+2=23
So the full equation with the answer would be
21=23-2
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