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2014-11-09T10:57:13+02:00
A)7(x-2)+9=44
7x-14+9=44
7x=44+14-9
7x=49
x=49/7
x=7

b) 8(x+3)+7=71
8x+24+7=71
8x=71-24-7
8x=40
x=5
4 3 4
2014-11-09T11:04:33+02:00
A)7x-14+9=44
7x-14=44-9
7x-14=35
7x=35+14
7x=49
x=49:7
x=7
v:7(7-2)+9=44
b)8x+24=71-7
8x+24=64
8x=64-24
8x=40
x=40:8
x=5
v:8(5+3)+7=71