Question

1+4*(Х+20)=40*(1-Х)
решите

Answer 1

1+4*(Х+20)=40*(1-Х); 1+4х+80=40-40х; 4х+40х=40-81; 44х=-41; Х=-41/44

Answer 2

1+4×x+4×20=40×(1-x)
1+4x+80=40×(1-x)
81+4x-40×(1-x)
81+4x=40×1-40×x
81+4x=40-40x
81+40x=40-81
44x=40-81
44x=-41
x=-41/44