Problem
(1) \( 5 x+6=2 x+15 \) 3 (2) \( 7 x-4=20+3 x \) (3) \( 2 x+15=43-5 x \) (4) \( 3+4 x=9 x+13 \) (5) \( 2 x-10=44+8 x \) (6) \( -7 x-2=24-9 x \) (7) \( 27-11 x=x-33 \) 19 (8) \( 21 x+6=17 x-26 \)
Solution
Step 1 ：['\\( 5x-2x=15-6 \\)', '\\( 3x=9 \\)', '\\( x=3 \\)']
Step 2 ：['\\( 7x-3x=20+4 \\)', '\\( 4x=24 \\)', '\\( x=4 \\)']
Step 3 ：['\\( 2x+5x=43-15 \\)', '\\( 7x=28 \\)', '\\( x=4 \\)']
Step 4 ：['\\( 4x-9x=13-3 \\)', '\\( -5x=10 \\)', '\\( x=-2 \\)']
Step 5 ：['\\( 2x-8x=44+10 \\)', '\\( -6x=54 \\)', '\\( x=-6 \\)']
Step 6 ：['\\( -7x+9x=24+2 \\)', '\\( 2x=26 \\)', '\\( x=-13 \\)']
Step 7 ：['\\( 11x+x=27+33 \\)', '\\( 12x=60 \\)', '\\( x=5 \\)']
Step 8 ：['\\( 21x-17x=-26-6 \\)', '\\( 4x=-32 \\)', '\\( x=-2 \\)']
