Answer:
x = -28
Step-by-step explanation:
−1/4x=7
Multiply each side by -4 to isolate the variable
-4 * −1/4x= -4*7
−1/4x=7
Answer:
Step-by-step explanation:
Let Jire's age = x
Pamela's age = x - 12
Sum of their ages = 28
x + x - 12= 28
2x - 12 = 28
2x = 28+12
2x = 40
x = 40/2
x = 20
Jiri's age = 20 year
Answer:
-4
Step-by-step explanation:
it would be -9+5 which is basically 5-9=-4
so, the answer is -4.
Answer:
x = 121
Step-by-step explanation:
The sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is the number of sides
Here n = 7, thus
sum = 180° × 5 = 900°
Sum the given angles and equate to 900
x + 125 + 119 + 117 + 145 + 133 + 140 = 900, that is
x + 779 = 900 ( subtract 779 from both sides )
x = 121
Answer:
-8
Step-by-step explanation:
any number divided by a nega is going to be neg if it is multiplied by two nega's its positive.