Question

tìm x biết :

2x+(5-x)+3*(x-79)=0

Answer 1

2x + ( 5 - x) + 3* ( x - 79 ) = 0

2x + 5 - x + 3x - 3*79 = 0

2x - x + 3x + 5 - 237 = 0

4x - 232 = 0

4x = 232

x = 232 : 4

x = 58

~ Thiên mã ~

Answer 2

thank you.

Answer 3

2x+(5-x)+3*(x-79)=0

2x+(5-x)+3*x-3*79=0

2x+(5-x)+3x-237=0

2x+3x+(5-x)=-237

x(2+3)+5-x=-237

5x+5-x=-237

x(5-1)+5=-237

4x+5=-237

4x=-237-5

4x=-242

x=-242:4

x=-60.5

vậy x=-60.5