Tìm x, biết: b) 128 × x – x × 16 – 12 × x = 520 800.
Giải thích
b) 128 × x – x × 16 – 12 × x = 520 800
x × (128 – 16 – 12) = 520 800
x × 100 = 520 800
x = 520 800 : 100
x = 52 080.
b) 128 × x – x × 16 – 12 × x = 520 800
x × (128 – 16 – 12) = 520 800
x × 100 = 520 800
x = 520 800 : 100
x = 52 080.