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Matemática com figurinha

Tente resolver os problemas de matemática com figurinhas abaixo.

Resposta:

Morango = x
Banana = y
x + y = 9 -> x = 9 – y
2x + 5y = 30
2(9 – y) + 5y = 30
18 – 2y + 5y =30
3y = 30 -18
y = 12 / 3
y = 4
x = 9 – y
x = 9 – 4
x = 5
Portanto, o morango (x) vale 5 e a banana (y) vale 4.

Resposta:

Cachorro = x
Gato = y
3x – y = 50
y + x = 30 -> y = 30 – x
3x – (30 – x) = 50
3x – 30 +x = 50
4x = 80
x = 20
y = 30 – x
y = 30 – 20
y = 10
Portanto, o cachorro (x) vale 20 e o gato (y) vale 10.

Resposta:

Luigi = x
Mario = y
2x / y = 6 -> 2x = 6y
48 – 5x = y
2x = 6(48 – 5x)
2x = 288 – 30x
2x + 30x = 288
32x = 288
x = 288 / 32
x = 9
y = 48 – 5x
y = 48 – 5*9
y = 48 – 45
y = 3
Portanto, Luigi (x) vale 9 e o Mario (y) vale 3.

Resposta:

Psyduck = x
Munchlax = y
7 + x = y – 7 -> x = y – 14
(x + 1) / (y – 1) = 1 / 7 ->7(x + 1) = 1(y-1) -> 7x + 7 = y -1 -> 7x = y – 8
7(y – 14) = y – 8
7y – 98 = y – 8
7y – y = 98 – 8
6y = 90
y = 90 / 6
y = 15
x = y – 14
x = 15 – 14
x = 1
Portanto, Psyduck (x) vale 1 e Munchlax (y) vale 15.