как решить 1)(x)+4=7 2)2(x+6)=30 3) (x)-8=3 4)(4x-7)+6=11
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x=3
2)2x+13=30
2x=30-13
2x=17
x=8,5
3)x=3+8
x=11
4)4x-7-5=0
4x=12
x=3
х=7-4
х=3
2)2(х+6)=30
2х+12=30
2х=30-12
2х=18
х=9
3) х-8=3
х=3+8
х=11
4) (4х-7)+6=11
4х-7=11-6
4х-7=5
4х=5+7
4х=12
х=3