Question

[Đỗ thế khang]

Tính 

1) -7129+1478+7129+(-1479)

2) /-5/.(-7)+4.(-9)

3) (-4)²+35:(-7)

Tìm số nguyên x biết 

1) x-9=-5.8

2) x +8=-4+11

3) /x/-2=-3.(-8)

4) /x-2/=/-72/

Answer 1

[•๖ۣۜLү ²ƙ⁸ ( ๖ۣۜTεαм ๖ۣۜNɦâη ๖ۣۜMã ...]

\(\text{-7129+1478+7129+(-1479)}\)

\(=\text{-7129+7129+1478+(-1479)}\)

\(=0-1=-1\)

Answer 2

[•๖ۣۜLү ²ƙ⁸ ( ๖ۣۜTεαм ๖ۣۜNɦâη ๖ۣۜMã ...]

\(\text{|-5|.(-7)+4.(-9)}\)

\(=\text{5.(-7)+4.(-9)}\)

\(=\left(-35\right)+\left(-36\right)=-71\)