Question

. Află valoarea lui „a” din: [ ( a + 428 : 4 ) x 2 + 5 ] x 2 – 186 = 800

Answer 1

[(a+107) x 2+5] x 2 -186 = 800
(2a+214+5) x 2 - 186 = 800
(2a +219) x 2 - 186 = 800
4a + 438 - 186 = 800
4a = 800-438+186
4a=548 => a=$\frac{548}{4}$ => a=137