When solving 7x + 12 = 4x you can begin by
subtracting 4x from each side of the equation.
this gives 3x + 12 = 0
solve 7x + 12 = 4x

X=-4

Step-by-step explanation:

first subtract 7x from both sides then divide -3x from 12 and you will get -4=x or X=-4.

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

the answer is c hope it

step-by-step explanation: