7 +5x= -18
5x= -25
X= -5
B) one solution
C) i think it is : ( 14 + 10(-5))/ 12 = -36/ 12= -3
490/7 math problems division = 70.
70 to 2 decimal places= 70
490/7 divided by 2 » (490/7) ÷ 2 » 70 ÷ 2 = 35
743,214 rounded to the nearest ten thousand would be 740,000