2000+2000+2000+x=7000
4000+2000+x=7000
6000+x=7000
x=7000-6000
x=1000
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6000 + X = 7000
X = 7000 - 6000
X = 1000
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\(2000+2000+2000+x=7000\)
\(2000.3\) \(+x=7000\)
\(6000\) \(+x=7000\)
\(x=7000-6000\)
\(x=1000\)