​

) x + 2 5 = − 4 3 x+ 5 2 ​ = 3 −4 ​ ; x = − 4 3 − 2 5 x= 3 −4 ​ − 5 2 ​ x = − 26 15 x= 15 −26 ​ . b) − 5 6 + 1 3 . x = ( − 1 2 ) 2 6 −5 ​ + 3 1 ​ .x=( 2 −1 ​ ) 2 ; − 5 6 + 1 3 . x = 1 4 6 −5 ​ + 3 1 ​ .x= 4 1 ​ 1 3 . x = 1 4 + 5 6 3 1 ​ .x= 4 1 ​ + 6 5 ​ 1 3 . x = 13 12 3 1 ​ .x= 12 13 ​ x = 13 12 : 1 3 x= 12 13 ​ : 3 1 ​ x = 13 4 x= 4 13 ​ . c) 7 12 − ( x + 7 6 ) . 6 5 = ( − 1 2 ) 3 12 7 ​ −(x+ 6 7 ​ ). 5 6 ​ =( 2 −1 ​ ) 3 . 7 12 − ( x + 7 6 ) . 6 5 = − 1 8 12 7 ​ −(x+ 6 7 ​ ). 5 6 ​ = 8 −1 ​ ( x + 7 6 ) . 6 5 = 7 12 − ( − 1 8 ) (x+ 6 7 ​ ). 5 6 ​ = 12 7 ​ −( 8 −1 ​ ) ( x + 7 6 ) . 6 5 = 17 24 (x+ 6 7 ​ ). 5 6 ​ = 24 17 ​ x + 7 6 = 85 144 x+ 6 7 ​ = 144 85 ​ x = 85 144 − 7 6 x= 144 85 ​ − 6 7 ​ x = − 83 144 x= 144 −83 ​ .

​