5*3+2*3=(5+2)*3
6*4+3*4=(6+3)*4
5*4+4*4=(4+4)*5
<span>7*2+8*2=(7+8)*2</span>
sin(arccos(-4/5))=sin(π-arccos(4/5))=sin(arccos(4/5))=√(1-cos²(arccos4/5))=√(1-(4/5)²)=√(1-16/25)=√(9/25)=3/5
85,3 =85, 0,8=1, 6,5=7, 5,4=5, 0,797=1, 99,8=100
26*(х+427)=15756
26х+11102=15756
26х=15756-11102
26х=4654
х=4654/26
х=179
Ответ:179