Question

14ax + x + a +2x =
2ab - 3ba +5a - a =
xy - x + y - yx =
abc + bca + cab =

x + 3x + 4x - 5x + 7x, если x = 34,7

Answer 1

$\tt 14ax+x+a+2x=14ax+3x+a\\\\2ab-3ba+5a-a=(5a-a)+(2ab-3ab)=4a-ab\\\\xy-x+y-yx=(y-x)+(xy-xy)=y-x\\\\abc+bca+cab=abc+abc+abc=3abc\\\\\\\\x+3x+4x-5x+7x=x(1+3+4-5+7)=10x$

при х = 34,7     $\tt 10x=10\cdot 34,7=347$