Question

(4X+20)/4=(6X-20)/5怎样算 (4X+20)/4-2=(6X-20)/5 (4X+20)/4+2=(6X

Answer 1

(4X+20)/4=(6X-20)/5

5(4x+20)=4(6x-20)

20x+100=24x-80

-4x=-180

x=45

(4X+20)/4-2=(6X-20)/5

5(4x+20)-40=4(6x-20)

20x+100-40=24x-80

-4x=-140

x=35

(4X+20)/4+2=(6X-20)/5

5(4x+20)+40=4(6x-20)

20x+100+40=24x-80

-4x=-220

x=55