Question

Va rog, repede dau multe puncte ​

Answer 1

I.

1. 7

2. 1234

3. 66

4.-17

5.54

6.-9

II. 1. a.-4x=-16(inmultesti cu -1)=> 4x=16=>x=4

b. 5x-3x=11+3=>2x=14=>x=7

c.5x-5=2x+7=>5x-2x=7+5=>3x=12=>x=4

d.6x-15=6x-6-9=>6x-6x=-6-9+15(se reduc toti termenii)=>0=-15+15=>0=0

2. 1-((-4)+12+(-4))-3=1-4-3=-3-3=-6

III.1. 3(x-13)=-24=>3x-39=-24=>3x=-24+39=>3x=15=>x=5

2.o+d+v=26,o=d,v=12,d=?

12+2d=26=>2d=14=>d=7(dana are 7 ani,la fel ca oana si de asta o+d=2d)

3.m+c=138;m=c+75,4;c=?

c+75,4+c=138=>2c=138-75,4=>2c=62.6=>c=31,3(kg de caise)