Question

[(×:2+5):6+180]:91=2,[(4*y+15):7+120]:25=5,calculati 2*×+3*y.​

Answer 1

[(X÷2+5)÷6+180]÷91=2

[(X/2 +5)×1/6 +180]×1/91=2

(X+10/2 ×1/6 +180)×1/91=2

(X+10/12 +180)×1/91=2

X+10×2160/12 ×1/91=2

X+2170/12 ×1/91=2

X+2170/1092=2 /×1092

X+2170=2184

X=2184-2170

X=14

[(4×y+15)÷7+120]÷25=5

(4y+15/7 +120)×1/25=5

4y+15+840/7 ×1/25=5

4y+855/7 ×1/25=5

4y+855/175=5 /×175

4y+855=875

4y=875-855

4y=20 /÷4

y=5

2×X+3×y=

2×14+3×5=

=28+15

=43

Sper ca te-am ajutat!