Question

Rezolvaţi ecuatiile: a)-9x + 17 =-10; b) 3(x + 2) = 27; c) (x + 2): 3=-6; d) 2(x + 1) - 3 = 5; e) 7-2(x + 3) =-11; 0) 15+3(x - 1)= 6; g) 7(x - 2) - 13 = 8; h) 6(x – 3) + 7 = -35; i) 4 - 3(x + 5) = -17; j) (3x + 1): 5 = 5; k) 3x - 8 = 13; 1)-9 + 7x = 5x + 11; m) 6x - 13 = 2x - 1; n) 2,5x - 3(1,5x + 2) = 4,8; o) 5x – 9 + 2x = 19; p) 2r + 1 1 1 -0,(6); r) 2x + 3(x - 5) = -0,75 + = x; s) = 5x - 18. 3 2 3 2 = - - ) + 1 - 0 = -​

Answer 1

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Answer 2

$\it a)\ \ -9x+17=-10 \Rightarrow 17+10=9x \Rightarrow 9x=27 \Rightarrow x=3\\ \\ b)\ \ 3(x+2)=27|_{:3} \Rightarrow x+2=9 \Rightarrow x=7\\ \\ c)\ \ (x+2):3=6|_{\cdot3} \Rightarrow x+2=18 \Rightarrow x=16\\ \\ d)\ \ 2(x+1)-3=5|_{+3} \Rightarrow 2(x+1)=8|_{:2} \Rightarrow x+1=4 \Rightarrow x=3$

$e)\ 7-2(x+3)=-11 \Rightarrow 7+11=2(x+3) \Rightarrow 18=2(x+3)|_{:2} \Rightarrow 9=x+3\Rightarrow x =6$

$\it h)\ 6(x-3)+7=-35|_{-7} \Rightarrow 6(x-3)=-42|_{:6} \Rightarrow x-3=-7|_{+3}\Rightarrow x=-4$

$\it m)\ 6x-13=2x-1 \Rightarrow 6x-2x=-1+13 \Rightarrow 4x=12\Rightarrow x=3$