Question

X= 10
RESOLVA AS ATIVIDADES:
1) X + 10 = 56
2) X-20 = 80
3) X + 3 = 13
4) X-8 = 16
5) X + 5 =35
6) X + 7 = 42
7) X-6 = 14
8) X - 12 = 50
9) X + 3 = 12
10) X - 23= 45
1) 2.X + 1 = 11
2) 2.X + 5 = 35
3) 2.X + 2 = 16
4) 3X - 1 = 32
5) 3.X + 5= 20
6) 2.X - 1= 35
7) 2.X + 3 = 33
8) 2.X - 4= 44
9) 2.X-1= 21​

Answer 1

Resposta:

20) 0

21) 0

22) 0

23) 10

24) 7

Explicação passo-a-passo:

20) [(12 x 2 + 3 x 4 – 5 x 6) x (8 : 2 + 9 : 3 + 1 – 2 x 4) x (15 + 3)] x 10

[(24 + 12 - 30) x ( 4 + 3 + 1 -8) × 18]×10

[(36-30)×(8-8)×18]×10

[6×0×18]×10

[0×18]×10

0×10

0

21) 65 x 13 – {[(35 x 42 – 23 x 51) – 72 x 3] x 25 – (72 x 29 – 12 x 15 x 3) + 92 x 4} =

845 - {[(1470 - 1173) - 216] × 25 - ( 2088 - 540) + 368}

845 - {81 × 25 - ( 1752) + 368}

845 -{ 81 × 25 - 1548 + 358}

845 - { 2025 - 1548 + 358 }

845 - 845

0

22) {81 – [(5 x 4 – 2 x 3) x 5 – (15 x 2 – 2) : (2 x 4 – 1) + 10]} x [8 : (2 x 3 – 5) – 64 : 8] =

{81 - [ (20 - 6 )×5 - ( 30-2) ÷ ( 8 -1) +10]} × [8 : ( 6 - 5) - 8]

{81 - [ 14 × 5 - 28 ÷ 9 + 10 ] } ×[8: 1 - 8]

{81 - [ 70 - 4 + 10] } × [ 8-8]

{81 - 76 ] × 0

5 × 0

0

23){[(138 : 3 – 2 x 20) : 3 + 56 : 7] : 5 + 52 : 4} : 3 + [12 x 2 – (15 + 4)] =

{[(46 - 40) : 3 + 8] : 5 + 13 } : 3 + [ 24 - 19]

{[6 : 3 + 8] : 5 + 13 } : 3 + 5

{[ 2 + 8] : 5 + 13 } : 3 + 5

{10 : 5 + 13 } : 3 + 5

{2 + 13 } : 3 + 5

15 : 3 + 5

5+5

10

24) (1 + 2 x 75 + 47 x 2) : {12 x 5 – 5 x [29 x 3 + 11 – 7 x (21 : 7 + 19 x 2 – 54 : 2) + (46 : 2 + 17 x 2 – 7) : 10]}

(1 + 150 + 94) : {60 – 5 x [87 + 11 – 7 x (3 + 38 – 27) + (23 + 34 – 7) : 10]}

245 : {60 – 5 x [87 + 11 – 7 x 14 + 50 : 10]}

245 : {60 – 5 x [87 + 11 – 98 + 5]}

245 : {60 – 5 x 5}

245 : {60 – 25}

245: 35

7