Срочно! 1)4(х+2)-7(2х-1)=30-9(3х-4) 2) (3х+12)/4 = 2- (5х-7)/3 3) (5х+3)/2 + (3х-8)/4 = 4

[latex]1)4(x+2)-7(2x-1)=30-9(3x-4)\\ 4x+8-14x+7=30-27x+36\\ 4x-14x+27x=30+36-8-7\\ 17x=51\\ x=51:17\\ x=3\\ [/latex] ответ: 3 [latex]2)\frac{3x+12}4=2-\frac{5x-7}3 \ |*12\\ 3(3x+12)=24-4(5x-7)\\ 9x+36=24-20x+28\\ 9x+20x=24+28-36\\ 29x=16\\x=\frac{16}{29}\\ \\ [/latex] ответ: 16/29 [latex]3) \frac{5x+3}2+\frac{3x-8}4=4 \ |*4\\ 2(5x+3)+3x-8=16\\ 10x+6-3x-8=16\\ 10x-3x=16-6+8\\ 7x=18\\ x=\frac{18}7=2\frac47[/latex] ответ: 2 4/7

4х+8-14х+7=30-27х+36 -10х+15=66-27х 17х=51 х=3 3(3х+12)/12=8-4(5х-7)/12 9х+36=8-20х+28 -11х=0 х=0 2(5х+3)+3х-8=16 10х+6+3х-8=16 13х=18 х=1 5/13