Z podanego wzoru wyznacz wielkość x : a) 2x-y=4 b)-5x+10y=15 c)0,5x+3y=0,2 d) 3/4x - 1/2y=1
a)2x-y=4
2x=4+y |:2
x=2+0,5y
b)-5x+10y=15
-5x=15-10y |:(-5)
x=-3+2y
c) 0,5x+3y=0,2
0,5x=0,2-3y |*2
x=0,4-6y
d) 3/4x - 1/2y=1
3/4x=1+1/2y |* 4/3
x=4/3 + 2/3y
a) 2x-y=4
2x=4+y/:2
x=2+y/2
b)b)-5x+10y=15
-5x=15-10y/:(-5)
c))0,5x+3y=0,2
0,5x=0,2-3y/:0,5
x=2/5-6y
3/4x=1+1/2y/:3/4
x=4/3+2/3y
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a)2x-y=4
2x=4+y |:2
x=2+0,5y
b)-5x+10y=15
-5x=15-10y |:(-5)
x=-3+2y
c) 0,5x+3y=0,2
0,5x=0,2-3y |*2
x=0,4-6y
d) 3/4x - 1/2y=1
3/4x=1+1/2y |* 4/3
x=4/3 + 2/3y
a) 2x-y=4
2x=4+y/:2
x=2+y/2
b)b)-5x+10y=15
-5x=15-10y/:(-5)
x=-3+2y
c))0,5x+3y=0,2
0,5x=0,2-3y/:0,5
x=2/5-6y
d) 3/4x - 1/2y=1
3/4x=1+1/2y/:3/4
x=4/3+2/3y