Question

a) l4x-5l =1
b) 3(2-x)=5(x-1)-7(5-x)-2x-3
c)(5x+1)²+(12x-5)²=(13x-1)²+1

Answer 1

4x-5 = 1
4x = 6
x = 6/4

5-4x = 1
4x = 4
x = 1

6-3x=5x-5-35+7x-2x-3
6-3x = 10x - 43
13x = 49
x = 49/13

25x² +10x +1 + 144x² - 120x + 25 = 169x² -26x +1 +1
169x² -110x +25 = 169x² - 26x +2
(169x² cu celalalt 169x² se reduc)
-110x +25 = -26x +2
23 = 84x
x = 23/84