Answer:
C
Step-by-step explanation:
Since it's the product, the two numbers must be multiplied together. -3 * x will equal 21, so -3x=21. By dividing both sides by -3, we see that x=-7
The answer would be about 356
Answer:
the second and third equations are true
Step-by-step explanation:
first equation
39-3*6=6*10/4+4
39-18=60/4+4
21=15+4
21=19
the equation is false
second equation
24/2^2=50-6^2-8
24/4=50-36-8
6=14-8
6=6
the equation is true
third equation
56/8+3^2=2*2^3
7+9=2*8
16=16
the equation is true
fourth equation
8^2-5^2=4^2-7
64-25=16-7
39=9
the equation is not true
Answer:
10
Step-by-step explanation:
