a, \(5^0=1\)
b, \(12.35+35.182-35.66\)
\(=35.\left(12+182-66\right)\)
\(=35.128\)
\(=4480\)
c, \(x+2x=6\)
\(x.1+2.x=6\)
\(x\left(1+2\right)=6\)
\(x.3=6\)
\(x=2\)
d, \(x+x=30\)
\(2x=30\)
\(x=30:2\)
\(x=15\)
e, 2x -25 +5x =45
2x+5x=45+25
2x + 5x = 70
7x = 70
x = 10
f, x-7 + 2x = 8
x+2x=8+7
3x =15
x = 5
\(5^0=1\\ 12.35+35.182-35.66\Leftrightarrow35.\left(12+182-66\right)=35.128=4480\\ x+2x=6\Leftrightarrow3x=6\Leftrightarrow x=2\\ x+x=30\Leftrightarrow2x=30\Leftrightarrow x=15\\ 2x-25+5x=45\Leftrightarrow-25+7x=45\Leftrightarrow7x=70\Leftrightarrow x=10\\ x-7+2x=8\Leftrightarrow-7+3x=8\Leftrightarrow3x=15\Leftrightarrow x=5\)
