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14×7+2x+122=4×(57+12×15)

Răspuns :

14 × 7 + 2x + 122 = 4 × ( 57 + 12 × 15 )

98 + 2x + 122 = 4 × ( 57 + 180 )

98 + 2x + 122 = 4 × 237

220 + 2x = 948

2x = 948 - 220

2x = 728

x = 728 : 2

x = 364