Question

1)7/9x=14
2)4-0,4x=-8
3)7x-4=x+8

Answer 1

$\displaystyle 1)\frac{7}{9}x=14\\\\ \frac{9}{7}*\frac{7}{9}x=\frac{9}{7}*14\\\\ x=9*2\\ x=18 \\\\ 2)4-0,4x=-8\\-0,4x=-8-4\\-0,4x=-12\\x=30\\\\ 3)7x-4=x+8\\7x-x=8+4\\6x=12\\x=2$