Tìm x: a) −5(2 – x) + 4(x – 3) = 10x – 15
Giải thích
a) −5(2 – x) + 4(x – 3) = 10x – 15
−10 + 5x + 4x – 12 = 10x – 15
9x – 22 = 10x – 15
10x– 9x = 15–22
x= −7
Vậy x = −7
a) −5(2 – x) + 4(x – 3) = 10x – 15
−10 + 5x + 4x – 12 = 10x – 15
9x – 22 = 10x – 15
10x– 9x = 15–22
x= −7
Vậy x = −7