Question

tính

125.16.3+80.25.7

293+96.14+96.86+107

tìm x  biết 2x-138=2^3.3^2

Answer 1

125.16.3+80.25.7

25.5.16.3+25.80.7

25.240+25.560

25.(240+560)

25.800

20000

293+96.14+96.86+107

293+96.(14+86)+107

293+96.100+107

293+9600+107

9893+107

10000

2x-138=2^3.3^2

2x-138=72

2x=72+138

2x=210

  x=210:2

  x=105

vay x=105

nhớ **** cho mình nha

Answer 2

ket qua x = 105