a) -3x = 2x - 10 -2x -3x = -10 -5x = -10 / : (-5) x = 2 b) 2x - 2 = 7 - x 2x + x = 7 + 2 3x = 9 / : 3 x = 3 c) 10 = 4 - 2x 2x = 4 - 10 2x = -6 / : 2 x = -3 d) -(2x - 1) = 4 -2x + 1 = 4 -2x = 4-1 -2x = 3 / : (-2) x = 3/2 x = 1,5 e) 2(x+1) = x 2x + 2 = x x = -2 f) 2t - (3t+1) = 6 2t - 3t -1 = 6 -t = 6+1 -t = 7 / : (-1) t = -7 g) -(4 + x) = 2(3-x) -4 - x = 6 - 2x x = 6 + 4 x = 10 h) 3(y+6) - y = 2(y + 9) 3y + 18 - y = 2y + 18 3y - y - 2y = 18-18 0=0 i) (x-7) - 2(3x+5) = 3 x-7 - 6x + 10 = 3 x-6x = 3+7-10 -5x = 0 / : (-5) x = 0
a) -3x = 2x - 10 -3x-2x = - 10 -5x = - 10 / :(-5) x = 2 b) 2x - 2 = 7 - x 2x + x = 7 + 2 3x = 9 /:3 x = 3 c) 10 = 4 - 2x 2x = 4 - 10 2x = -6 /:2 x = - 3 d) - (2x - 1) = 4 - 2x + 1 = 4 - 2x = 4 - 1 - 2x = 3 / (-2) x = - 1,5 e) 2 (x + 1) = x 2x + 2 = x 2x - x = - 2 x = -2 f) 2t - (3t + 1) = 6 2t - 3t - 1 = 6 2t - 3t = 6+1 -t = 7 /(-1) t = -7 g) -(4 + x) = 2(3 - x) -4 - x = 6 - 2x -x + 2x = 6 + 4 x = 10 h) 3(y+6) - y = 2(y + 9) 3y + 18 - y = 2y + 18 3y - y - 2y = 18 - 18 0 = 0 i) (x - 7) - 2(3x + 5) = 3 x - 7 - 6x - 10 = 3 x - 6x = 3+ 7 + 10 - 5x = 20 / : (-5) x = -4
a) -3x = 2x - 10 - 3x - 2x = 10 - 5x = 10 / :(-5) x = -2 b) 2x - 2= 7 - x 2x + x = 7 + 2 3x = 9 / : 3 x = 3 c) 10 = 4 - 2x 10 - 4 = -2x 6 = -2x / :(-2) -3 = x d) - (2x - 1) = 4 - 2x + 1 = 4 - 2x = 4-1 - 2x = 3 / :(-2) x = -1,5 e) 2( x + 1) = x 2x + 3 = x 2x - x = -3 x = -3 f) 2t-(3t + 1) = 6 -6t + 2t = 6 - 4t = 6 / :(-4) t = -1,5 g) - (4 + x) = 2 (3 - x) -4 -x = 6 - 2x -x + 2x = 6 + 4 x = 10 h) 3(y+6) - y = 2 (y + 9) 3y + 18 -y = 2y + 18 3y - y - 2y = 18 -18 0 = 0 i) ( x-7)-2(3x +5) = 3 (x-7) - 6x - 10 = 3 x- 6x = 3+7+10 -5x = 20 /:(-5) x = -4
