Some number times 21 is equal to the number increased by -17

Make the number "x"

Product means multiplication, so -17x

A number "increased by" means addition so x+(-21)

These two expressions should be set equal to each other:

-17x=x+(-21)

-17x=x+(-21)

-18x=-21

x=(-21/-18)

x= 7/6

subtract x from both sides divide both sides by -18 simplify

answer: 4 meters

step-by-step explanation: to you understand 2/3 better you can do 1 divided by 3 = . then multiply that by the 2 which is .66666666666666667 then you would do 6 x .66666666666666667 which is 4.      

hope this .

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116