1) 3 = 4(х+2); 3=4x+8; -4х=5; x = -5/4.
2) <span>-7=5(х+5); -7 = 5x+25; -5x=32; x = -32/5. </span>
1) = (х-3)*(х+3) : (х+3) = х-3
2) = (a-b)(a-b) : (a-b)(a+b) = (a-b) / (a+b)
3) (5-х)(5+х) : (5+х) = 5-х
A | V | t
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1 | 6 | 6/x | x
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2 | 5 | 5/x | x
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1 | 36 | 6/x | 36/(6/x)
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2 | 36 | 5/x | 36/(5/x)
36x/6 +1,5 = 36x/5 : 3
2x+0,5=12x/5
10x+ 2,5-12x=0
2x=2,5
x=1,25
V1=6/x= 6/1,25=600/125=4,8
V2=5/x= 5/1,25=4
Ответ:
ax - 3y
10*(-5)-3*(1/3) = -50-1 = -51
Объяснение: