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Serjik [45]
3 years ago
7

Solve each equation mentally.

Mathematics
2 answers:
motikmotik3 years ago
7 0
16. 4 (9*4=36) 
17. 6 (6*11=66)
18. 8 (10*8=80)
19. 9 (9*5=45)
20. 48 (4*12=48)
21. 13 (13*2=26)



andreyandreev [35.5K]3 years ago
4 0
16.4
17.6
18.8
19.9
20.48
21.13
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2 years ago
I need help with these two equations
Ivan

for these you need to rearrange the equations and do substitutions.

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5-y + 2y = 8 2y - y becomes 1y which becomes y then subtract 5 from each side to get y =3

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