Ответ:
4х+7х=1.98
3х=1.98
х=1.98÷3
х=0.66
9z-5z=5.52
4z=5.52
z=5.52÷4
z=1.38
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Ответ:
4х+7х=1.98
3х=1.98
х=1.98÷3
х=0.66
9z-5z=5.52
4z=5.52
z=5.52÷4
z=1.38