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pickupchik [31]
4 years ago
13

Lisa is weighing combinations of children's blocks. four blue blocks and five red blocks weigh 32 ounces. one blue block and eig

ht red blocks weigh 35 ounces. what is the combined weight of one red block and one blue block?
Mathematics
1 answer:
lana66690 [7]4 years ago
3 0
4b + 5r = 32
b + 8r = 35.....multiply by -4
----------------
4b + 5r = 32
-4b - 32r = - 140 (result of multiplying by -4)
---------------add
- 27r = - 108
r = -108/-27
r = 4 <== each red block weighs 4 oz

b + 8r = 35
b + 8(4) = 35
b + 32 = 35
b = 35 - 32
b = 3 <=== each blue block weighs 3 oz

so 1 red block + 1 blue block weight (3 + 4) = 7 oz <==


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3 0
3 years ago
Read 2 more answers
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