solve 1.3z / 0.5z 2.6, solve 1.3z + z / 2 5, solve 1.3z + 2 6, solve 1.3z 1.5 5.4, solve 1.3z - 1.5 3, solve 1.3z - 5.4 1.5 for z, solve 1.3z + 1.5 5 for z, solve 1.3z - 1.5 for z, solve 1.3z - 3 0
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