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Math problems in junior high school about addition and subtraction of algebraic expressions (detailed answers).
( 1)2(4x-0.5)=8x- 1

(2)-3( 1-6/ 1x)=-3+ 18/ 1x

(3)-x+(2x-2)-(3x+5)=-x+2x-2-3x- 15 =-2x- 13

(4)3a? +a? -(2a? -2a)+(3a-a? )=4a? -2a? +2a+3a-a? =a? +5a

(5)(5a+4c+7b)+(5c-3 B- 6a)=-a+4 b+ c

(6)(8xy-x? +y? )-(x? -Really? +8xy)=-2x? +2y?

(7)(2x? -2/ 1+3x)-4(x-x? +2/ 1)=2x? -2+3x-4x+4x? -8=6x? -x- 10

(8)3x? -[7x-(4x-3)-2x? ] =3x? -(3x+3-2x? )=5x? 3x 3