Question

Resolva as equações A 3×-1/5=4 B x+9/9=1

Answer 1

A)...... ( 3 .x - 1) / 5 = 4.....................B).........( x + 9) / 9 = 1

.............3.x - 1 = 4 . 5.......................................x + 9 = 1 . 9

..............3.x - 1 = 20..........................................x + 9 = 9

...............3.x = 20 + 1.......................................x = 9 - 9

................3.x = 21.................................................x = 0..........S = { 0 }

................x = 21 : 3

................x = 7...........S = { 7 }