oblicz metodą działań obustronnych
a)2x+7=-3,5
b)4,5x-9= 2,7x+5
c) 6x-5=8 - 4x
pomocy !!!
a.) 2x +7 = -3,5 / -7
2x= -10,5 / :2
x= -5,25
b.) 4,5x-9=2,7x+5 / -2,7x
2,8x - 9 = 5 /+9
2,8x = 14
x = 5
c.) 6x-5 = 8 -4x /+5
6x = 8-4x +5 / +4x
10x = 13
x = 1,3
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a.) 2x +7 = -3,5 / -7
2x= -10,5 / :2
x= -5,25
b.) 4,5x-9=2,7x+5 / -2,7x
2,8x - 9 = 5 /+9
2,8x = 14
x = 5
c.) 6x-5 = 8 -4x /+5
6x = 8-4x +5 / +4x
10x = 13
x = 1,3