oblicz wartość wyrażenia: 7x +9 dla x=1/7 4x-2y dla x=3 i y=1/3 1/3x + 2/5y dla x=5 i y=2
x=1/7
7x+9=7*1/7+9=7/7+9=1+9=10
x=3
y=1/3
4x-2y=4*3-2*1/3=12-2/3=12/1-2/3=36/3-2/3=34/3=11⅓
x=5
y=2
1/3x+2/5y=1/3*5+2/5*2=5/3+4/5=25/15+12/15=37/15=2 i 7/15
7*1/7+9=1+9=10
4*3-2*1/3=12 - 2/3=11 1/3
1/3*5 + 2/5*2= 1 2/3 + 4/5= 1 10/15 + 12/15 = 2 7/15
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x=1/7
7x+9=7*1/7+9=7/7+9=1+9=10
x=3
y=1/3
4x-2y=4*3-2*1/3=12-2/3=12/1-2/3=36/3-2/3=34/3=11⅓
x=5
y=2
1/3x+2/5y=1/3*5+2/5*2=5/3+4/5=25/15+12/15=37/15=2 i 7/15
7*1/7+9=1+9=10
4*3-2*1/3=12 - 2/3=11 1/3
1/3*5 + 2/5*2= 1 2/3 + 4/5= 1 10/15 + 12/15 = 2 7/15