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WILL GIVE BRAINLIEST
Use your knowledge about parentheses and substitution to solve the following:

q = 1; r = 2; s = 3; t = 4; x = 5; y = 6

7. 2(x+4) + 10 =

8. 3(4x) + 4 =

9. 10(xy) =

10. 2(x + y) =

Sagot :

7: 2(9)+10= 28
8: 3(20)+4= 64
9: 10(30)= 300
10: 2(11) = 22
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