Question

(a +9:3) x 5 = 45 - 5

a - (42: 6) = 50 x 2
c) 21 900 - (a + 5 760) = 7 860

a x [(130:5+ 72:2 - 13): (735 : 5 - 140)] = 238

a: 5 = 5 + [5 - (5 x 1-5:5 + 1) x 1]

a + 149 + (72 : 8 + 28 : 4) : 4 = 396

[1 250 : 10 - (46 + 14 x b)] x 3 = 195​

Answer 1

Răspuns:

(a+9:3)x5=45-5

(a+3)x5=40

(a+3)=40:5

(a+3)=8

a=8-3

a=5

a-(42:6)=50x2

a-7=100

a= 100+7

a=107

21 900-(a+5760)=7860

21 900-a=7 860+5 760

21 900-a=13 620

a=21 900-13 620

a=8 280

a x[(130:5+72:2-13):(735:5-140)]=238

a x[(26+36-13):(147-140)]=238

a x(49:7)=238

ax7=238

a=34

a:5=5+[5-(5x1-5:5+1)X1]

a :=5+[5-(5-1+1)X1]

a:5=5+(5-5x1)

a:5=5+0

a:5=5

a= 5x5

a=25

a+149+(72:8+28:4):4=396

a+149+(9+7):4=396

a+149+16:4=396

a+149+4=396

a+153=396

a=396-153

a=243

[1 250:10-(46+14xb)]X3=195

[125-(46+14xb)]X3=195

[125-(46+14xb)]=195:3

[125-(46+14xb)]=65

(46+14xb)=125-65

(46+14xb)=60

14xb=60-46

14xb=14

b=14:14

b=1