Question

[675-126 x 3+(426:3+108 x X):2]:4 x 6=714

Answer 1

[675-126 x 3+(426:3+108 x X):2]:4 x 6=714

[297+(142+108×x):2]:4×6=714/:6

[297+(142+108×x):2]:4=119/×4

297+(142+108×x):2=476/-297

(142+108×x):2=179/×2

142+108×x=358/-142

108×x=216/:108

x=2