Question

Решите уравнения:
I 5y I-4=6;
3/7+I 4x I=1;
4+I 3y I =7.

Answer 1

$|5y| - 4 = 6 \ 5 times |y| - 4 = 6 \ 5 times |y| = 6 + 4 \ 5 times |y| = 10 \ |y | = 2 \ y = +2 \ y = - 2$

$frac{3}{7} + |4x| = 1 \ frac{3}{7} + 4 times |x| = 1 \ 4 times |x | = 1 - frac{3}{7} \ 4 times |x| = frac{4}{7} \ |x | = frac{1}{7} \ x = frac{1}{7} \ x = - frac{1}{7}$

$4 + |3y| = 7 \ 4 + 3 times |y| = 7 \3 times |y| = 7 - 4 \ 3 times |y| = 3 \ |y| = 1 \ y = 1 \ y = - 1$