Jawaban:
3x+90+2x=180
5x=180-90
5x=90
x=90/5=18. gambar 4.32
8 ( 3x+5)+(x-15)=180
4x-10=180
4x=190
x=47,5
9. 5x-22=3x+16
5x-3x=16+22
2x=38
x=19
Sudut AZC=5x-22=5(19)-22=95-22=73
sudut BZC=180-73=107
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Jawaban:
3x+90+2x=180
5x=180-90
5x=90
x=90/5=18. gambar 4.32
8 ( 3x+5)+(x-15)=180
4x-10=180
4x=190
x=47,5
9. 5x-22=3x+16
5x-3x=16+22
2x=38
x=19
Sudut AZC=5x-22=5(19)-22=95-22=73
sudut BZC=180-73=107