foo.cc: In function 'int main()':
foo.cc:7:5: warning: statement has no effect [-Wunused-value]
    7 |  z+t==35;
      |  ~~~^~~~
foo.cc:8:9: warning: statement has no effect [-Wunused-value]
    8 |  2*z+4*t==94;
      |  ~~~~~~~^~~~

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