A) 5x + 5x + 3x + 4x +1 W tych dwóch chyba brakuje znaku "=" :) B) 10x - 3 - 2x + 3x - 13 C) 11 - 6y = 2y + 7y + 26 -15= 15y /:15 y= -1 D) 7 (x + 3) = 20 7x+21=20 7x=-1/:7 x=-1/7 E) 2y + 13 = 5y + 4 9=3y/:3 y= 3
A) 5x + 5x + 3x + 4x +1= 17x + 1 B) 10x - 3 - 2x + 3x - 13= 11x - 16 C) 11 - 6y = 2y + 7y + 26 11 - 6y = 9y +26 -15y=15 y=-1 D) 7 (x + 3) = 20 7x +21 = 20 7x = -1 x=-1/7 E) 2y + 13 = 5y + 4 -3y = -9 y=3
a) 17x +1 b) 11x-16 c) 11-6y = 9y + 26 /+6y 11 = 15y +26 /26 -15 = 15y /:15 -1 = y d) 7(x+3) = 20 7x+21 = 20 /-21 7x = -1 / :7 x = -1/7 e) 2y+13 =5y +4 /-13 2y = 5y -9 /-5y -3y = -9 /:(-3) y= 3
