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4-2\left(1-\frac{b}{2}\right)=-2b+74
Whakareatia ngā taha e rua o te whārite ki te 2.
4-2\left(1-\frac{b}{2}\right)+2b=74
Me tāpiri te 2b ki ngā taha e rua.
2\left(4-2\left(1-\frac{b}{2}\right)\right)+4b=148
Whakareatia ngā taha e rua o te whārite ki te 2.
4\left(4-2\left(1-\frac{b}{2}\right)\right)+8b=296
Whakareatia ngā taha e rua o te whārite ki te 2.
4\left(4-2+2\times \frac{b}{2}\right)+8b=296
Whakamahia te āhuatanga tohatoha hei whakarea te -2 ki te 1-\frac{b}{2}.
4\left(4-2+\frac{2b}{2}\right)+8b=296
Tuhia te 2\times \frac{b}{2} hei hautanga kotahi.
4\left(4-2+b\right)+8b=296
Me whakakore te 2 me te 2.
4\left(2+b\right)+8b=296
Tangohia te 2 i te 4, ka 2.
8+4b+8b=296
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te 2+b.
8+12b=296
Pahekotia te 4b me 8b, ka 12b.
12b=296-8
Tangohia te 8 mai i ngā taha e rua.
12b=288
Tangohia te 8 i te 296, ka 288.
b=\frac{288}{12}
Whakawehea ngā taha e rua ki te 12.
b=24
Whakawehea te 288 ki te 12, kia riro ko 24.