Question

1) (24:3+45:5)+143=4.j+124 2)12×2:k=4 3)(4×l+5)-6×2=5 4)m:7+(123×3-53×4)=164 5)(n-45:9)×3=2185-2164 6)(24-7×3)×5÷3:0=30:10 7)(p-28:7+200)×5=32000+3×10 8)923-p+145=693 9)r×r+648=7×100×2×10+3×3 Va rog ajutati-ma

Answer 1

1) (24:3+45:5)+143=4.j+124
(8+9)+143=4j+124
160=4j+124
160-24=4j
4j=136
j=34

2)12×2:k=4
24/k=4
4k=24
k=6

3)(4×l+5)-6×2=5
4i+5=5+12
4i=17-5
4i=12
i=3

4)m:7+(123×3-53×4)=164
m:7+(123×3-53×4)=164
m:7+(369-212)=164
m:7=164-157
m:7=7
m=49

5)(n-45:9)×3=2185-2164
(n-6)×3=21
n-6=21:3
n=7+6
n=13

6)(24-7×3)×5÷3:0=30:10
(24-21)×5÷3:0=3
15÷3:0=3
5:0=3
0≠3

7)(p-28:7+200)×5=32000+3×10
(p-4+200)×5=32000+30
p-4+200=32030:5
p-4+200=6406
p=6406-200+4
p=6210

8)923-p+145=693
923-693+145=p
p=375

9)r×r+648=7×100×2×10+3×3
r×r+648=14000+9
r×r=14009-648
r×r=13361