a,
(2x-3)-(x-5)=(x+2)-(x-1)
2x-3-x+5=x+2-x+1
x+2=3
x=1
b,
2(x-1)-5(x+2)=-10
2x-2-5x+10=-10
-3x+8=-10
-3x=-18
x=6
a) ( 2x - 3 ) - ( x - 5 ) = ( x + 2 ) - ( x - 1 )
2x - 3 - x + 5 = x + 2 - x + 1
( 2x - x ) + ( 5 - 3 ) = ( x - x ) + ( 2 + 1 )
x + 2 = 3
x = 3 - 2
x = 1
b) 2( x - 1 ) - 5( x + 2 ) = -10
2x - 2.1 - 5x + 5.2 = -10
2x - 2 - 5x + 10 = -10
( 2x - 5x ) + ( 10 - 2 ) = -10
-3x + 8 = -10
-3x = -10 - 8
-3x = -18
x = -18 : -3
x = 6