Question

Stiind ca 2x+2×y+45=59determinati 4×y+4×x+32; stiind ca x+3×y+18=54 determinati 6×y+89+2×y ; stiind ca (x+48)+(y+52)=200determinati 200+y+x; stiind ca x+y+75=124 determinati 101+y+x ; stiind ca 5×x+7×y+30=230 determinati 1000+2×y+3×x+2×x+5×y; AJUTORRRR va rog!!!!!!!

Answer 1

2 x + 2 y + 45 = 59

2 x + 2 y = 59 - 45

2 ( x + y ) = 14

x + y = 14 : 2

x + y = 7

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4 x + 4 y + 32 = 4 ( x + y ) + 32 = 4 × 7 + 32 = 28 + 32 = 60

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x + 3 y  + 18 = 54

x + 3 y = 54 - 18

x + 3 y = 36

6 y + 89 + 2 x = 2 ( x + 3 y ) + 89 = 2 × 36 + 89 = 72 + 89 = 161

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( x + 48 ) + ( y + 52 ) = 200

x + y + 100 = 200

x + y = 200 - 100

x + y = 100

200 + y + x = 200 + 100 = 300

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x + y + 75 = 124

x + y = 124 - 75

x + y = 49

101 + x + y = 101 + 49 = 150

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5 x + 7 y + 30 = 230

5 x + 7 y = 230 - 30

5 x + 7 y = 200

1000 + 2 y + 3 x + 2 x + 5 y = 1 000 + 5 x + 7 y = 1 000 + 200 = 1 200