x=0 bn nhé

3x + 17 = 12 
        3x = 12 - 17

        3x = -5

    => x = 1,6

make complete sentences using the given words of phrases:

1. how long ago/christmas tree/come/usa?

2.how many/activity/there/competition?

3.lot/food/try/enjoy/group of students.

4.she/said/love/music/want/dance.

5.why/englishmen/design/card?

6.turn/lights/when/go out.

Write the sentences using the given words

1. Brother/take/shower/soon as/arrive/home/yesterday

2.It/kind/you/say so

3.It/nice/her/help/children/street

4.You/mind/I/took/children/me?

5.Toys/make/children/this/school

6.Children/interested/car toys

7.USA/millions/old cars/throw/every year

sao mất dậy

Tuổi bố là:(68+14):2=41 (tuổi)

Tuổi con là:68-41=27 (tuổi)

Đáp số:Bố 41 tuổi

           Con 27 tuổi