a number increased by 7 is minus 23
x+7 = -23
??
To solve the problem, we can set up an equation based on the given information. Let's call the unknown number "x". According to the problem, the number increased by 7 equals -23.
This can be written as an equation: x + 7 = -23
To find the value of x, we need to isolate it on one side of the equation. We can do this by subtracting 7 from both sides:
x + 7 - 7 = -23 - 7
x = -30
Therefore, the unknown number is -30.