1.

\begin{array}{l}{10+y=11} \\ {\frac{d}{7}=11} \\ {12-9 t=3}\end{array}

Answer»

2. 10 + y = 11 y = 11 - 10 = 1

5. d/7 = 11 d = 77

10+y=11

y=11-10

y=1

8. 12 - 9t = 3 9t = 12 - 3 = 9 t = 1

d/7=11

d=7×11

d=77



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