Tìm x biết: 114 - 2. (2x + 11) = 80
Giải thích
114 − 2(2x + 11) = 80
114 − 4x – 22 = 80
114 – 22 − 4x = 80
92 − 4x = 80
−4x + 92 = 80
−4x = −12
x = −12 : −4
x = 3
114 − 2(2x + 11) = 80
114 − 4x – 22 = 80
114 – 22 − 4x = 80
92 − 4x = 80
−4x + 92 = 80
−4x = −12
x = −12 : −4
x = 3