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2.4z+1.5z-6.5=0.7
We move all terms to the left:
2.4z+1.5z-6.5-(0.7)=0
We add all the numbers together, and all the variables
3.9z-7.2=0
We move all terms containing z to the left, all other terms to the right
3.9z=7.2
z=7.2/3.9
z=1+1/1.1818181818182
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