Question

Am nevoie de ex. 11 va roggggg !!!URGENT ! Am nevoie neaparat !!!

Answer 1

$\displaystyle 11a)2(4x-5)=5x+14 \Rightarrow 8x-10=5x+14 \Rightarrow 8x-5x=14+10 \Rightarrow \\ \\ \Rightarrow 3x=24 \Rightarrow x= \frac{24}{3} \Rightarrow \boxed{x=8} \\ \\ b)3(2x-1)=23-7x \Rightarrow 6x-3=23-7x \Rightarrow 6x+7x=23+3 \Rightarrow \\ \\ \Rightarrow 13x=26 \Rightarrow x= \frac{26}{13} \Rightarrow \boxed{x=2}$

$\displaystyle c)4(3x-5)=2x+10 \Rightarrow 12x-20=2x+10 \Rightarrow 12x-2x=10+20 \Rightarrow \\ \\ 10x=30 \Rightarrow x= \frac{30}{10} \Rightarrow \boxed{x=3} \\ \\ d)5(2x-9)=3x+11 \Rightarrow 10x-45=3x+11 \Rightarrow 10x-3x=11+45 \Rightarrow \\ \\ \Rightarrow 7x=56 \Rightarrow x= \frac{56}{7} \Rightarrow \boxed{x=8}$

$\displaystyle e)2x+4=(x-10)6 \Rightarrow 2x+4=6x-60 \Rightarrow 2x-6x=-60-4 \Rightarrow \\ \\ \Rightarrow -4x=-64 \Rightarrow x= \frac{64}{4} \Rightarrow \boxed{x=16} \\ \\ f)10x+29=(1+3x)7 \Rightarrow 10x+29=7+21x \Rightarrow 10x-21x=7-29\Rightarrow \\ \\ \Rightarrow -11x=-22 \Rightarrow x= \frac{22}{11} \Rightarrow \boxed{x=2}$