Current location - Training Enrollment Network - Mathematics courses - Elementary school math problems are unary equations! Use the equation!
Elementary school math problems are unary equations! Use the equation!
Solutions; Let this road have xkm, and set the equation according to the meaning of the question:

(2/5)x=5+7

Solution: x=30

This road is 30 kilometers long.

Solution: Suppose there are X people in Factory B, and make an equation according to the meaning of the question:

(2/5)x+ 100=400

Solution: x=750

A: there are 750 people in factory B.

Solution: Let the headscarf price be X yuan, and set the equation according to the meaning of the question:

x*2+( 1/2)x*2=39,6

Solution: x =13,2

( 1/2)x=6.6

Answer; Pillow towel price 6.6 yuan, headscarf price 13.2 yuan.

Solution: Suppose there are X boys, and do the equation according to the meaning of the question:

There is something wrong with the problem. There are more boys than the total If boys account for five-eighths of the total, the conclusion is established.

Solution: Suppose there are X boys, and do the equation according to the meaning of the question:

x=(5/8)*(x+x- 10)

Solution: x=25

x- 10= 15

A: Boys are 25 and girls are 15.

Solution: Let this bucket of water have xkg, and set the equation according to the meaning of the question:

(1/3)*x= seventeen and three quarters-twelve and one quarter.

Solution: x= 15

Answer; This bucket of water weighs 15kg.